11 Introduction to Contract Law

After reading this chapter, you should understand the following:

  1. What role contracts play in society today.
  2. What a contract is.
  3. The sources of contract law.
  4. Some basic contract taxonomy.
  5. The required elements of a contract: mutual assent, consideration, legality, and capacity.
  6. Common problems with contracts, such as undue influence and fraud.
  7. The circumstances when a contract needs to be in writing to be enforceable.
  8. The remedies for breach of contract.

The two legal cornerstones of business relationships are contract and tort. Although both involve the concept of duty, creation of the duty differs in a manner that is important to business. The parties create contract duties through a bargaining process. The key element in the process is voluntary consent; individuals are in control of a situation because they have the freedom to decide whether to enter into a contractual relationship. Tort duties, in contrast, are obligations the law imposes, whether or not the parties desire. Together, voluntary obligations in contract and involuntary obligations in tort are the foundational aspects of the common law of business.

11.1 General Perspectives on Contracts

After reading this section, you should be able to do the following:

  1. Understand the role of contract in society: it moves society from status to contract.
  2. Know the definition of a contract.
  3. Recognize the sources of contract law: the common law, the UCC, and the Convention on the International Sale of Goods—a treaty (the CISG).
  4. Understand some fundamental contract taxonomy and terminology.

11.1.1 The Role of Contract in Society

Contract is probably the most familiar legal concept in our society because it is so central to a deeply held conviction about the essence of our political, economic, and social life. In common parlance, the term is used interchangeably with agreement, bargain, undertaking, or deal; but whatever the word, it embodies our notion of freedom to pursue our own lives together with others. Contract is central because it is the means by which a free society orders what would otherwise be a jostling, frenetic anarchy. So commonplace is the concept of contract—and our freedom to make contracts with each other—that it is difficult to imagine a time when contracts were rare, an age when people’s everyday associations with one another were not freely determined. Yet in historical terms, it was not so long ago that contracts were rare, entered into if at all by very few. In historical societies and in the medieval Europe from which our institutions sprang, the relationships among people were largely fixed; traditions spelled out duties that each person owed to family, tribe, or manor. Though he may have oversimplified, Sir Henry Maine, a nineteenth-century historian, sketched the development of society in his classic book Ancient Law . As he put it:

(F)rom a condition of society in which all the relations of Persons are summed up in the relations of Family, we seem to have steadily moved towards a phase of social order in which all these relations arise from the free agreement of Individuals. . . . Thus the status of the Slave has disappeared—it has been superseded by the contractual relation of the servant to his master. . . . The status of the Female under Tutelage . . . has also ceased to exist. . . . So too the status of the Son under Power has no true place in the law of modern European societies. If any civil obligation binds together the Parent and the child of full age, it is one to which only contract gives its legal validity. . . . If then we employ Status, agreeably with the usage of the best writers, to signify these personal conditions [arising from ancient legal privileges of the Family] only, we may say that the movement of the progressive societies has hitherto been a movement. [1]

This movement was not accidental. It went hand-in-glove with the emerging industrial order; from the fifteenth to the nineteenth centuries, as England, especially, evolved into a booming mercantile economy with all that that implies—flourishing trade, growing cities, an expanding monetary system, commercialization of agriculture, mushrooming manufacturing—contract law was created of necessity.

Contract law did not develop, however, according to a conscious, far-seeing plan. It was a response to changing conditions, and the judges who created it frequently resisted, preferring the quieter, imagined pastoral life of their forefathers. Not until the nineteenth century, in both the United States and England, did a full-fledged law of contracts arise together with modern capitalism.

11.1.2 Contract Defined

As usual in the law, the legal definition of “contract” is formalistic. The Restatement says: “A contract is a promise or a set of promises for the breach of which the law gives a remedy, or the performance of which the law in some way recognizes as a duty.” [2] Similarly, the Uniform Commercial Code says: “ ‘Contract’ means the total legal obligation which results from the parties’ agreement as affected by this Act and any other applicable rules of law.” [3] A short-hand definition is: “A contract is a legally enforceable promise.”

11.1.3 Economic View of Contract Law

In An Economic Analysis of Law (1973), Judge Richard A. Posner (a former University of Chicago law professor) suggests that contract law performs three significant economic functions. First, it helps maintain incentives to individuals to exchange goods and services efficiently. Second, it reduces the costs of economic transactions because its very existence means that the parties need not go to the trouble of negotiating a variety of rules and terms already spelled out. Third, the law of contracts alerts the parties to trouble spots that have arisen in the past, thus making it easier to plan the transactions more intelligently and avoid potential pitfalls.

11.1.4 Sources of Contract Law

There are four basic sources of contract law: the Constitution, federal and state statutes, federal and state case law, and administrative law. For our purposes, the most important of these, and the ones that we will examine at some length, are case law [4] and statutes.

11.1.4.1 Case (Common) Law and the Restatement of Contracts Because contract law was forged in the common-law courtroom, hammered out case by case on the anvil of individual judges, it grew in the course of time to formidable proportions. By the early twentieth century, tens of thousands of contract disputes had been submitted to the courts for resolution, and the published opinions, if collected in one place, would have filled dozens of bookshelves. Clearly this mass of case law was too unwieldy for efficient use. A similar problem had developed in the other leading branches of the common law. Disturbed by the profusion of cases and the resulting uncertainty of the law, a group of prominent American judges, lawyers, and teachers founded the American Law Institute in 1923 to attempt to clarify, simplify, and improve the law. One of its first projects, and ultimately one of its most successful, was the drafting of the Restatement of the Law of Contracts [5] , completed in 1932. A revision—the Restatement (Second) of Contracts—was undertaken in 1946 and finally completed in 1979.

The Restatement of Contracts won prompt respect in the courts and has been cited in innumerable cases. The Restatements are not authoritative, in the sense that they are not actual judicial precedents, but they are nevertheless weighty interpretive texts, and judges frequently look to them for guidance. They are as close to “black letter” rules of law as exist anywhere in the American legal system for judge-made (common) law.

11.1.4.2 Statutory Law: The Uniform Commercial Code Common law contract principles govern contracts for real estate and for services, obviously very important areas of law. But in one area the common law has been superseded by an important statute: the Uniform Commercial Code (UCC), the modern American state statutory law governing commercial transactions, especially Article 2 [6] , which deals with the sale of goods (movable, tangible items). Briefly put, the UCC is a model law developed by the American law Institute and the National Conference of Commissioners on Uniform State Laws; it has been adopted in one form or another in all fifty states, the District of Columbia, and the American territories. Before the UCC was written, commercial law varied, sometimes greatly, from state to state. This first proved a nuisance and then a serious impediment to business as the American economy became nationwide during the twentieth century.

The UCC provides a flexible and yet highly technical framework for sale of goods that will, for large part, be beyond the scope of this chapter. The text will note some cases when substantial and important differences exist between the common law (services and real estate) and the UCC (sale of goods). For example, under the common law offer must meet acceptance exactly for a contract to be formed, while the UCC is much more flexible, which reflects commercial practice in which offered terms and conditions often don’t match terms and conditions in acceptances.

11.1.5 The Convention on Contracts for the International Sale of Goods

A Convention on Contracts for the International Sale of Goods (CISG)An international body of contract law. was approved in 1980 at a diplomatic conference in Vienna. (A convention is a preliminary agreement that serves as the basis for a formal treaty.) The Convention has been adopted by several countries, including the United States.

The Convention is significant for three reasons. First, the Convention is a uniform law governing the sale of goods—in effect, an international Uniform Commercial Code. The major goal of the drafters was to produce a uniform law acceptable to countries with different legal, social and economic systems. Second, although provisions in the Convention are generally consistent with the UCC, there are significant differences. For instance, under the Convention, consideration (discussed below) is not required to form a contract and there is no Statute of Frauds (a requirement that some contracts be evidenced by a writing to be enforceable—also discussed below). Finally, the Convention represents the first attempt by the US Senate to reform the private law of business through its treaty powers, for the Convention preempts the UCC if the parties to a contract elect to use the CISG. [7]

11.1.6 Basic Contract Taxonomy

Contracts are not all cut from the same die. Some are written, some oral; some are explicit, some not. Because contracts can be formed, expressed, and enforced in a variety of ways, a taxonomy of contracts has developed that is useful in lumping together like legal consequences. In general, contracts are classified along these dimensions: explicitness, mutuality, enforceability, and degree of completion. Explicitness is concerned with the degree to which the agreement is manifest to those not party to it. Mutuality takes into account whether promises are exchanged by two parties or only one. Enforceability is the degree to which a given contract is binding. Completion considers whether the contract is yet to be performed or the obligations have been fully discharged by one or both parties. We will examine each of these concepts in turn.

11.1.6.1 Explicitness

11.1.6.1.1 Express Contract An express contract [8] is one in which the terms are spelled out directly; the parties to an express contract, whether written or oral, are conscious that they are making an enforceable agreement. For example, an agreement to purchase your neighbor’s car for $500 and to take title next Monday is an express contract.

11.1.6.1.2 Implied Contract An implied contract is one that is inferred from the actions of the parties. Although no discussion of terms took place, an implied contract exists if it is clear from the conduct of both parties that they intended there be one. A delicatessen patron who asks for a “turkey sandwich to go” has made a contract and is obligated to pay when the sandwich is made. By ordering the food, the patron is implicitly agreeing to the price, whether posted or not.

11.1.6.1.3 Contract Implied in Law: Quasi-contract Both express and implied contracts embody an actual agreement of the parties. A quasi-contract [9] , by contrast, is an obligation said to be ‘ ‘imposed by law” in order to avoid unjust enrichment of one person at the expense of another. In fact, a quasi-contract is not a contract at all; it is a fiction that the courts created to prevent injustice. Suppose, for example, that a carpenter mistakenly believes you have hired him to repair your porch; in fact, it is your neighbor who has hired him. One Saturday morning he arrives at your doorstep and begins to work. Rather than stop him, you let him proceed, pleased at the prospect of having your porch fixed for free (since you have never talked to the carpenter, you figure you need not pay his bill). Although it is true there is no contract, the law implies a contract for the value of the work.

11.1.6.2 Mutuality The garden-variety contract is one in which the parties make mutual promises. Each is both promisor and promisee; that is, each pledges to do something and each is the recipient of such a pledge. This type of contract is called a bilateral contract. [10] But mutual promises are not necessary to constitute a contract. Unilateral contracts [11] , in which only one party makes a promise, are equally valid but depend upon performance of the promise to be binding. If Charles says to Fran, “I will pay you five dollars if you wash my car,” Charles is contractually bound to pay once Fran washes the car. Fran never makes a promise, but by actually performing she makes Charles liable to pay. A common example of a unilateral contract is the offer “$50 for the return of my lost dog.” Frances never makes a promise to the offeror, but if she looks for the dog and finds it, she is entitled to the $50.

11.1.6.3 Enforceability Not every agreement between two people is a binding contract. An agreement that is lacking one of the legal elements of a contract is said to be void [12] —that is, not a contract at all. An agreement that is illegal—for example, a promise to commit a crime in return for a money payment—is void. Neither party to a void “contract” may enforce it.

By contrast, a voidable contract [13] is one that is unenforceable by one party but enforceable by the other. For example, a minor (any person under eighteen, in most states) may “avoid” a contract with an adult; the adult may not enforce the contract against the minor, if the minor refuses to carry out the bargain. But the adult has no choice if the minor wishes the contract to be performed. (A contract may be voidable by both parties if both are minors.) Ordinarily, the parties to a voidable contract are entitled to be restored to their original condition. Suppose you agree to buy your seventeen-year-old neighbor’s car. He delivers it to you in exchange for your agreement to pay him next week. He has the legal right to terminate the deal and recover the car, in which case you will of course have no obligation to pay him. If you have already paid him, he still may legally demand a return to the status quo ante (previous state of affairs). You must return the car to him; he must return the cash to you.

A voidable contract remains a valid contract until it is voided. Thus, a contract with a minor remains in force unless the minor decides he does not wish to be bound by it. When the minor reaches his majority, he may “ratify” the contract—that is, agree to be bound by it-in which case the contract will no longer be voidable and will thereafter be fully enforceable.

An unenforceable contract [14] is one that some rule of law bars a court from enforcing. For example, Tom owes Pete money, but Pete has waited too long to collect it and the statute of limitations has run out. The contract for repayment is unenforceable and Pete is out of luck, unless Tom makes a new promise to pay or actually pays part of the debt. (However, if Pete is holding collateral as security for the debt, he is entitled to keep it; not all rights are extinguished because a contract is unenforceable.)

11.1.7 Degree of Completion

In medieval England, contract—defined as set of promises—was not an intuitive concept. The courts gave relief to one who wanted to collect a debt, for in such a case the creditor presumably had already given the debtor something of value, and the failure of the debtor to pay up was seen as manifestly unjust. But the issue was less clear when neither promise had yet been fulfilled. Suppose John agrees to sell Humphrey a quantity of wheat in one month. On the appointed day, Humphrey refuses to take the wheat or to pay. The modern law of contracts holds that a valid contract exists and that Humphrey is required to pay John.

An agreement consisting of a set of promises is called an executory contract [15] before either promise is carried out. Most executory contracts are enforceable. If one promise or set of terms has been fulfilled—if, for example, John had delivered the wheat to Humphrey—the contract is called partially executed. [16] A contract that has been carried out fully by both parties is called an executed contract. [17]

Finally, the common law recognizes contracts that are “substantially” performed. If one party to a contract performs in a way that doesn’t precisely fulfill the contract, but fulfills its essential terms, the common law would require the other party perform. For example, if someone building a house for another installed the cabinets incorrectly, the buyer would still need to pay for the house. The buyer could then claim damages or require the builder to fix the cabinets. The UCC has a different rule for buying goods: sellers are bound by the “perfect tender” rule, which requires that buyers receive exactly what they ordered or they may reject the good.

Contract is the mechanism by which people in modern society make choices for themselves, as opposed to being born or placed into a status as is common in feudal societies. A contract is a legally enforceable promise. The law of contract is the common law (for contracts involving real estate and services), statutory law (the Uniform Commercial Code for contract involving the sale or leasing of goods), and treaty law (the Convention on the International Sale of Goods). Contracts may be described based on the degree of their explicitness, mutuality, enforceability, and degree of completion.

11.2 Contract Formation

After reading this section, you should be able to do the following:

  1. Understand the elements of common-law contracts: mutuality of agreement (offer and acceptance), consideration, legality, and capacity.
  2. Learn when a contract must be in writing—or evidenced by some writing—to be enforceable.

Although it has countless wrinkles and nuances, contract law asks two principal questions: did the parties create a valid, enforceable contract? What remedies are available when one party breaks the contract? The answer to the first question is not always obvious; the range of factors that must be taken into account can be large and their relationship subtle. Since people in business frequently conduct contract negotiations without the assistance of a lawyer, it is important to attend to the nuances to avoid legal trouble at the outset. Whether a valid enforceable contract has been formed depends in turn on whether:

  1. The parties reached an agreement (offer and acceptance);
  2. Consideration was present (some “price was paid for what was received in return);
  3. The agreement was legal;
  4. The parties entered into the contract with capacity to make a contract; and
  5. The agreement is in the proper form (something in writing, if required).

11.2.1 The Agreement: Offer and Acceptance

The core of a legal contract is the agreement between the parties. Although agreements may take any form, including unspoken conduct between the parties, they are usually structured in terms of an offer and an acceptance. Note, however, that not every agreement, in the broadest sense of the word, need consist of an offer and acceptance, and it is entirely possible, therefore, for two persons to reach agreement without forming a contract. For example, people may agree that the weather is pleasant or that it would be preferable to go out for Chinese food rather than seeing a foreign film; in neither case has a contract been formed. One of the major functions of the law of contracts is to sort out those agreements that are legally binding—those that are contracts—from those that are not.

The Restatement (Second) of Contracts defines agreement as a “manifestation of mutual assent by two or more persons to one another.” [18] The UCC defines agreement as “the bargain of the parties in fact as found in their language or by implication from other circumstances including course of dealing or usage of trade or course of performance.” [19] The critical question is what the parties objectively said or did, not what they subjectively thought they said or did.

The distinction between objective and subjective standards crops up occasionally when one person claims he spoke in jest. The vice president of a manufacturer of punchboards, used in gambling, testified to the Washington State Game Commission that he would pay $100,000 to anyone who found a “crooked board.” Barnes, a bartender, who had purchased two that were crooked some time before, brought one to the company office, and demanded payment. The company refused, claiming that the statement was made in jest (the audience before the commission had laughed when the offer was made). The court disagreed, holding that it was reasonable to interpret the pledge of $100,000 as a means of promoting punchboards:

[I]f the jest is not apparent and a reasonable hearer would believe that an offer was being made, then the speaker risks the formation of a contract which was not intended. It is the objective manifestations of the offeror that count and not secret, unexpressed intentions. If a party’s words or acts, judged by a reasonable standard, manifest an intention to agree in regard to the matter in question, that agreement is established, and it is immaterial what may be the real but unexpressed state of the party’s mind on the subject. [20]

An offer is a manifestation of willingness to enter into a bargain such that it would be reasonable for another individual to conclude that assent to the offer would complete the bargain. Offers must be communicated and must be definite; that is, they must spell out terms to which the offeree can assent.

To constitute an agreement, there must be an acceptance of the offer. The offeree must manifest his assent to the terms of the offer in a manner invited or required by the offer. If the offer says “accept in skywriting at noon”, then the only way to accept the offer is to hire an airplane. If the offeror specifies no particular mode, then acceptance is effective when transmitted as long as the offeree uses a reasonable method of acceptance. It is implied that the offeree can use the same means used by the offeror or a means of communication customary to the industry. For example, the use of the postal service was so customary that acceptances are considered effective when mailed, regardless of the method used to transmit the offer. Indeed, the so-called “mailbox rule” (the acceptance is effective upon dispatch) has an ancient lineage, tracing back nearly two hundred years to the English courts. [21]

11.2.2 Consideration

Not every agreement forms a contract. One way in which agreements fail to become contracts is because they lack consideration. Consideration is the quid pro quo (something given or received for something else) between the contracting parties in the absence of which the law will not enforce the promise or promises made. Consider the following three “contracts”:

  1. Betty offers to give a book to Lou. Lou accepts.
  2. Betty offers Lou the book in exchange for Lou’s promise to pay $15. Lou accepts.
  3. Betty offers to give Lou the book if Lou promises to pick it up at Betty’s house. Lou accepts.

The question is which, if any, is a binding contract? In American law, only situation 2 is a binding contract, because only that contract contains a set of mutual promises in which each party pledges to give up something to the benefit of the other. [22]

The existence of consideration is determined by examining whether the person against whom a promise is to be enforced (the promisor [23] ) received something in return from the person to whom he made the promise (the promisee [24] ). That may seem a simple enough question. But as with much in the law, the complicating situations are never very far away. The “something” that is promised or delivered cannot just be anything: a feeling of pride, warmth, amusement, friendship; it must be something known as a legal detriment [25] —an act, a forbearance, or a promise of such from the promisee. The detriment need not be an actual detriment; it may in fact be a benefit to the promisee, or at least not a loss. At the same time, the “detriment” to the promisee need not confer a tangible benefit on the promisor; the promisee can agree to forego something without that something being given to the promisor. Whether consideration is legally sufficient has nothing to do with whether it is morally or economically adequate to make the bargain a fair one. Moreover, legal consideration need not even be certain; it can be a promise contingent on an event that may never happen. Consideration is a legal concept, and it centers on the giving up of a legal right or benefit.

Consideration has two elements. The first, as just outlined, is whether the promisee has incurred a legal detriment. (Some courts— although a minority—take the view that a bargained-for legal benefit to the promisor is sufficient consideration.) The second is whether the legal detriment was bargained for : did the promisor specifically intend the act, forbearance, or promise in return for his promise? Applying this two-pronged test to the three examples given at the outset of the chapter, we can easily see why only in the second is there legally sufficient consideration. In the first, Lou incurred no legal detriment; he made no pledge to act or to forbear from acting, nor did he in fact act or forbear from acting. In the third example, what might appear to be such a promise is not really so. Betty made a promise on a condition that Lou come to her house; the intent clearly is to make a gift. Betty was not seeking to induce Lou to come to her house by promising the book.

There is a widely recognized exception to the requirement of consideration. In cases of promissory estoppel, the courts will enforce promises without consideration. Simply stated, promissory estoppel [26] means that the courts will stop the promisor from claiming that there was no consideration. The doctrine of promissory estoppel is invoked in the interests of justice when three conditions are met: (1) the promise is one that the promisor should reasonably expect to induce the promisee to take action or forbear from taking action of a definite and substantial character; (2) the action or forbearance is taken; and (3) injustice can be avoided only by enforcing the promise.

Timko served on the board of trustees of a school. He recommended that the school purchase a building for a substantial sum of money, and to induce the trustees to vote for the purchase, he promised to help with the purchase and to pay at the end of five years the purchase price less the down payment. At the end of four years, Timko died. The school sued his estate, which defended on the ground that there was no consideration for the promise. Timko was promised or given nothing in return, and the purchase of the building was of no direct benefit to him (which would have made the promise enforceable as a unilateral contract). The court ruled that under the three-pronged promissory estoppel test, Timko’s estate was liable. [27]

11.2.3 Illegality

In general, illegal contracts are unenforceable. Thus, one can think of “legality” as being a required element of a contract, along with agreement, consideration, and capacity. As illegality is also a defense to a contract, we cover it later in the chapter.

11.2.4 Capacity

A contract is a meeting of minds. If someone lacks mental capacity [28] to understand what he is assenting to—or that he is assenting to anything—it is unreasonable to hold him to the consequences of his act.

Capacity issues often arise when contracting with minors. The general rule is that persons younger than eighteen can avoid their contracts.

Although the age of majority was lowered in most states during the 1970s to correspond to the Twenty-sixth Amendment (ratified in 1971, guaranteeing the right to vote at eighteen), some states still put the age of majority at twenty-one. Legal rights for those under twenty-one remain ambiguous, however. Although eighteen-year-olds may assent to binding contracts, not all creditors and landlords believe it, and they may require parents to cosign. For those under twenty-one, there are also legal impediments to holding certain kinds of jobs, signing certain kinds of contracts, marrying, leaving home, and drinking alcohol. There is as yet no uniform set of rules. The exact day on which the disability of minority vanishes also varies. The old common law rule put it on the day before the twenty-first birthday. Many states have changed this rule so that majority commences on the day of the eighteenth (or twenty-first) birthday.

A minor’s contract is voidable, not void. A child wishing to avoid the contract need do nothing positive to disaffirm; the defense of minority to a lawsuit is sufficient. Although the adult cannot enforce the contract, the child can (which is why it is said to be voidable, not void).

When the minor becomes an adult, she has two choices: she may ratify the contract or disaffirm [29] it. She may ratify explicitly; no further consideration is necessary. She may also do so by implication—for instance, by continuing to make payments or retaining goods for an unreasonable period of time. (In some states, a court may ratify the contract before the child becomes an adult. In California, for example, a state statute permits a movie producer to seek court approval of a contract with a child actor in order to prevent the child from disaffirming it upon reaching majority and suing for additional wages. As quid pro quo, the court can order the producer to pay a percentage of the wages into a trust fund that the child’s parents or guardians cannot invade.) If the child has not disaffirmed the contract while still a minor, she may do so within a reasonable time after reaching majority.

In most cases of disavowal, the only obligation is to return the goods (if he still has them) or repay the consideration (unless it has been dissipated). However, in two situations, a minor might incur greater liability: contracts for necessities and misrepresentation of age.

11.2.4.1 Contract for Necessities At common law, a “necessity” was defined as an essential need of a human being: food, medicine, clothing, and shelter. In recent years, however, the courts have expanded the concept, so that in many states today necessities include property and services that will enable the minor to earn a living and to provide for those dependent on him. If the contract is executory, the minor can simply disaffirm. If the contract has been executed, however, the minor must face more onerous consequences. Although he will not be required to perform under the contract, he will be liable under a theory of “quasi-contract” for the reasonable value of the necessity.

11.2.4.2 Misrepresentation of Age In most states, a minor may misrepresent his age and disaffirm in accordance with the general rule, because that’s what kids do, misrepresent their age. That the adult reasonably believed the minor was also an adult is of no consequence in a contract suit. But some states have enacted statutes that make the minor liable in certain situations. A Michigan statute, for instance, prohibits a minor from disaffirming if he has signed a “separate instrument containing only the statement of age, date of signing and the signature:” And some states “estop” him from claiming to be a minor if he falsely represented himself as an adult in making the ·contract. “Estoppel” is a refusal by the courts on equitable grounds to listen to an otherwise valid defense; unless the minor can return the consideration, the contract will be enforced.

Contracts made by an insane or highly intoxicated person are also said to have been made by a person lacking capacity. In general, such contracts are voidable by the person when capacity is regained (or by the person’s legal representative if capacity is not regained).

11.2.5 Form

As a general rule, a contract need not be in writing to be enforceable. An oral agreement to pay a high-fashion model $1 million to pose for a photograph is as binding as if the language of the deal were printed on vellum and signed in the presence of twenty bishops. For centuries, however, a large exception has grown up around the Statute of Frauds [30] , first enacted in England in 1677 under the formal name “An Act for the Prevention of Frauds and Perjuries.” The purpose of the Statute of Frauds is to prevent the fraud that occurs when one party attempts to impose upon another a contract that did not in fact exist.

The Statute of Frauds requires that certain kinds of contracts be in writing to be enforceable. These include:

  1. Contracts to convey an interest in land (such as sale of a home);
  2. Contracts that are impossible to fulfill within one year (such as a contract entered July 1, for employment beginning August 1 and lasting a year);
  3. Contracts in which the consideration is marriage;
  4. Contracts to pay another’s debt; and
  5. Under the UCC, contracts for sale of goods for at least $500 (and lease of goods of at least $1,000).

Again, as may be evident from the title of the act and its requirements, the general purpose of the law is to provide evidence, in areas of some complexity and importance, that a contract was actually made. To a lesser degree, the law serves to caution those about to enter a contract and “to create a climate in which parties often regard their agreements as tentative until there is a signed writing.” [31]

There are many exceptions to the Statute of Frauds. For example, under the UCC, custom goods manufactured, such as with the logo of another company, would be evidence of the agreement, as it is unlikely someone would produce custom goods without an agreement. If the parties have began to perform according to the oral agreement, it would also be hard to deny the contract exists, at least as to what has been performed. For contracts to pay another’s debt, if the primary purpose for which the agreement was made was to benefit the guarantor, then again an exception applies. These are just several examples, and so one should research the law carefully before trying to back out of a contract for Statute of Frauds concerns. Of course, it would be prudent to render the agreement in writing to begin with!

11.2.5.1 Parol Evidence

11.2.5.1.1 The Rule Unlike Minerva sprung forth whole from the brow of Zeus in Greek mythology, contracts do not appear at a stroke memorialized on paper. Almost invariably, negotiations of some sort precede the concluding of a deal. People write letters, talk by telephone, meet face-to-face, send e-mails, and exchange thoughts and views about what they want and how they will reciprocate. They may even lie and cajole in duplicitous ways, making promises they know they cannot or will not keep in order not to kill the contract talks. In the course of these discussions, they may reach tentative agreements, some of which will ultimately be reflected in the final contract, some of which will be discarded along the way, and some of which perhaps will not be included in the final agreement but will nevertheless not be contradicted by it. Whether any weight should be given to these prior agreements is a problem that frequently arises.

The rule at common law is this: a written contract intended to be the parties’ complete understanding discharges all prior or contemporaneous promises, statements, or agreements that add to, vary, or conflict with it.

The rule applies to all written contracts, whether or not the Statute of Frauds requires them to be in writing. The Statute of Frauds gets to whether there was a contract at all; the parol evidence rule says, granted there was a written contract, does it express the parties’ understanding? But the rule is concerned only with events that transpired before the contract in dispute was signed. It has no bearing on agreements reached subsequently that may alter the terms of an existing contract.

11.2.5.1.2 Exceptions to the Parol Evidence Rule Despite its apparent stringency, the parol evidence rule does not negate all prior agreements or statements, nor preclude their use as evidence. A number of situations fall outside the scope of the rule and hence are not technically exceptions to it, so they are better phrased as exemptions (something not within the scope of a rule).

If the parties never intended the written contract to be their full understanding—if they intended it to be partly oral—then the rule does not apply. If the document is fully integrated, no extrinsic evidence will be permitted to modify the terms of the agreement, even if the modification is in addition to the existing terms, rather than a contradiction of them. If the contract is partially integrated, prior consistent additional terms may be shown. It is the duty of the party who wants to exclude the parol evidence to show the contract was intended to be integrated. That is not always an easy task. To prevent a party later from introducing extrinsic evidence to show that there were prior agreements, the contract itself can recite that there were none. Here, for example, is the final clause in the National Basketball Association Uniform Player Contract: “This agreement contains the entire agreement between the parties and there are no oral or written inducements, promises or agreements except as contained herein.” Such a clause is known as a merger or integration clause

When the parties orally agree that a written contract is contingent on the occurrence of an event or some other condition (a condition precedent [32] ), the contract is not integrated and the oral agreement may be introduced. The classic case is that of an inventor who sells in a written contract an interest in his invention. Orally, the inventor and the buyer agree that the contract is to take effect only if the buyer’s engineer approves the invention. (The contract was signed in advance of approval so that the parties would not need to meet again.) The engineer did not approve it, and in a suit for performance, the court permitted the evidence of the oral agreement because it showed “that in fact there never was any agreement at all.” [33] Note that the oral condition does not contradict a term of the written contract; it negates it. The parol evidence rule will not permit evidence of an oral agreement that is inconsistent with a written term, for as to that term the contract is integrated.

11.2.6 Third-Party Rights

11.2.6.1 Assigning Rights Contracts create rights and duties. By an assignment [34] , an obligee (one who has the right to receive a contract benefit) transfers a right to receive a contract benefit owed by the obligor (the one who has a duty to perform) to a third person (assignee); the obligee then becomes an assignor (one who makes an assignment). The assignor may assign any right unless (1) doing so would materially change the obligation of the obligor, materially burden her, increase her risk, or otherwise diminish the value to her of the original contract; (2) statute or public policy forbids the assignment; or (3) the contract itself precludes assignment. A common example of this last point are prohibitions against subletting commonly found in leases–subletting is assigning the contractual right of occupancy.

An assignment of rights effectively makes the assignee stand in the shoes of the assignor. [35] She gains all the rights against the obligor that the assignor had, but no more. An obligor who could avoid the assignor’s attempt to enforce the rights could avoid a similar attempt by the assignee.

11.2.6.2 Delegating Duties To this point, we have been considering the assignment of the assignor’s rights (usually, though not solely, to money payments). But in every contract, a right connotes a corresponding duty, and these may be delegated. A delegation is the transfer to a third party of the duty to perform under a contract. The one who delegates is the delegator. Because most obligees are also obligors, most assignments of rights will simultaneously carry with them the delegation of duties. Unless public policy or the contract itself bars the delegation, it is legally enforceable.

An obligor who delegates a duty (and becomes a delegator) does not thereby escape liability for performing the duty himself. The obligee of the duty may continue to look to the obligor for performance unless the original contract specifically provides for substitution by delegation. This is a big difference between assignment of contract rights and delegation of contract duties: in the former, the assignor is discharged (absent breach of assignor’s warranties); in the latter, the delegator remains liable. The obligee (again, the one to whom the duty to perform flows) may also, in many cases, look to the delegatee, because the obligee becomes an intended beneficiary of the contract between the obligor and the delegatee.

11.2.6.3 Third-Party Beneficiaries The general rule is this: persons not a party to a con- tract cannot enforce its terms; they are said to lack privity [36] , a private, face-to-face relationship with the contracting parties. But if the persons are intended to benefit from the performance of a contract between others, then they can enforce it: they are intended beneficiaries.

For example, a contract to paint one’s house cannot be enforced by a neighbor–the neighbor might benefit from an increased home value due to your house looking maintained, but this benefit is only incidental . In contrast, a contract between A and B to deliver insurance proceeds to C would be enforcable by C. C is an intended, rather than merely incidental, beneficiary of the contract.

A contract requires mutuality—an offer and an acceptance of the offer; it requires consideration—a “price” paid for what is obtained; it requires that the parties to the contract have legal capacity to know what they are doing; it requires legality. Certain contracts—governed by the statute of frauds—are required to be evidenced by some writing, signed by the party to be bound. The purpose here is to avoid the fraud that occurs when one person attempts to impose upon another a contract that did not really exist. The parol evidence rule states that if a written contract is integrated, evidence of prior oral agreements cannot be used in court. Third parties may have stakes in contracts: contractual rights can be assigned in most cases, and contractual duties may be delegated. Intended third party beneficiaries may be able to enforce contracts to which they are not a party.

11.3 Defenses and Interpretations

Type your learning objectives here.

  1. Understand problems with voluntary consent, such as fraud, mistake, duress, and undue influence
  2. Understand when courts will choose not to enforce contracts for public policy reasons, such as unconscionability.
  3. Understand implications of illegal contracts.
  4. Understand rules for resolving ambiguity in contracts

Because contracts are voluntary agreements the law will enforce, the common law developed a variety of doctrines that responded to situations in which someone was not truly free to enter into the contract, or to situations in which courts felt it unfair to enforce the agreement. In this section we will study these doctrines.

11.3.1 Fraud

Misrepresentation is a statement of fact that is not consistent with the truth. If misrepresentation is intentional, it is fraudulent misrepresentation; if it is not intentional, it is nonfraudulent misrepresentation, which can be either negligent or innocent.

In further taxonomy, courts distinguish between fraud in the execution and fraud in the induce- ment. Fraud in the execution occurs when the nature of the document itself is misrepresented. For example, Alphonse and Gaston decide to sign a written contract incorporating terms to which they have agreed. It is properly drawn up, and Gaston reads it and approves it. Before he can sign it, however, Alphonse shrewdly substitutes a different version to which Gaston has not agreed. Gaston signs the substitute version. There is no contract. There has been fraud in the execution.

Fraud in the inducement is more common. It involves some misrepresentation about the subject of the contract that induces assent. Alphonse tells Gaston that the car Gaston is buying from Alphonse has just been overhauled—which pleases Gaston—but it has not been. This renders the contract voidable.

11.3.1.1 Nondisclosure A passive type of concealment is nondisclosure. Although generally the law imposes no obligation on anyone to speak out, nondisclosure of a fact can operate as a misrepresentation under certain circumstances. This occurs, for example, whenever the other party has erroneous information where the nondisclosure amounts to a failure to act in good faith, or where the party who conceals knows or should know that the other side cannot, with reasonable diligence, discover the truth.

In a remarkable 1991 case out of New York, a New York City stockbroker bought an old house upstate (basically anyplace north of New York City) in the village of Nyack, north of New York City, and then wanted out of the deal when he discovered—the defendant seller had not told him—that it was “haunted.” The court summarized the facts: “Plaintiff, to his horror, discovered that the house he had recently contracted to purchase was widely reputed to be possessed by poltergeists [ghosts], reportedly seen by defendant seller and members of her family on numerous occasions over the last nine years. Plaintiff promptly commenced this action seeking rescission of the contract of sale. Supreme Court reluctantly dismissed the complaint, holding that plaintiff has no remedy at law in this jurisdiction.”

The high court of New York ruled he could rescind the contract because the house was “haunted as a matter of law”: the defendant had promoted it as such on village tours and in Reader’s Digest. She had concealed it, and no reasonable buyer’s inspection would have revealed the “fact.” The dissent basically hooted, saying, “The existence of a poltergeist is no more binding upon the defendants than it is upon this court.” [37]

11.3.1.2 Statement Made False by Subsequent Events If a statement of fact is made false by later events, it must be disclosed as false. For example, in idle chatter one day, Alphonse tells Gaston that he owns thirty acres of land. In fact, Alphonse owns only twenty-seven, but he decided to exaggerate a little. He meant no harm by it, since the conversation had no import. A year later, Gaston offers to buy the “thirty acres” from Alphonse, who does not correct the impression that Gaston has. The failure to speak is a nondisclosure—presumably intentional, in this situation—that would allow Gaston to rescind a contract induced by his belief that he was purchasing thirty acres.

11.3.1.3 Statements of Opinion An opinion, of course, is not a fact; neither is sales puffery. For example, the statements “In my opinion this apple is very tasty” and “These apples are the best in the county” are not facts; they are not expected to be taken as true. Reliance on opinion is hazardous and generally not considered justifiable.

If Jack asks what condition the car is in that he wishes to buy, Mr. Olson’s response of “Great!” is not ordinarily a misrepresentation. As the Restatement puts it: “The propensity of sellers and buyers to exaggerate the advantages to the other party of the bargains they promise is well recognized, and to some extent their assertions must be discounted.” [38] Vague statements of quality, such as that a product is “good,” ought to suggest nothing other than that such is the personal judgment of the opinion holder.

Despite this general rule, there are certain exceptions that justify reliance on opinions and effectively make them into facts. Merely because someone is less astute than the one with whom she is bargaining does not give rise to a claim of justifiable reliance on an unwarranted opinion.

11.3.2 Mistake

In discussing fraud, we have considered the ways in which trickery by the other party makes a contract void or voidable. We now examine the ways in which the parties might “trick” themselves by making assumptions that lead them mistakenly to believe that they have agreed to something they have not. A mistake is “a belief about a fact that is not in accord with the truth.” [39]

11.3.2.1 Mistake by One Party

11.3.2.1.1 Unilateral Mistake Where one party makes a mistake, it is a unilateral mis- take. [40] The rule: ordinarily, a contract is not voidable because one party has made a mistake about the subject matter (e.g., the truck is not powerful enough to haul the trailer; the dress doesn’t fit).

11.3.2.1.2 Exceptions If one side knows or should know that the other has made a mistake, he or she may not take advantage of it. A person who makes the mistake of not reading a written document will usually get no relief, nor will relief be afforded to one whose mistake is caused by negligence (a contractor forgets to add in the cost of insulation) unless the negligent party would suffer unconscionable hardship if the mistake were not corrected. Courts will allow the correction of drafting errors in a contract (“reformation”) in order to make the contract reflect the parties’ intention. [41]

11.3.2.2 Mutual Mistake In the case of mutual mistake [42] —both parties are wrong about the subject of the contract—relief may be granted.

The Restatement sets out three requirements for successfully arguing mutual mistake. [43] The party seeking to avoid the contract must prove that:

  1. The mistake relates to a “basic assumption on which the contract was made,”
  2. The mistake has a material effect on the agreed exchange of performances, and
  3. The party seeking relief does not bear the risk of the mistake.

Basic assumption is probably clear enough. In the famous “cow case,” the defendant sold the plaintiff a cow—Rose of Abalone—believed by both to be barren and thus of less value than a fertile cow (a promising young dairy cow in 2010 might sell for $1,800). [44] Just before the plaintiff was to take Rose from the defendant’s barn, the defendant discovered she was “large with calf”; he refused to go on with the contract. The court held this was a mutual mistake of fact—“a barren cow is substantially a different creature than a breeding one”—and ruled for the defendant. That she was infertile was “a basic assumption,” but—for example—that hay would be readily available to feed her inexpensively was not, and had hay been expensive, that would not have vitiated the contract.

11.3.2.2.1 Material Effect on the Agreed-to Exchange of Performance “Material effect on the agreed-to exchange of performance” means that because of the mutual mistake, there is a significant difference between the value the parties thought they were exchanging compared with what they would exchange if the contract were performed, given the standing facts. Again, in the cow case, had the seller been required to go through with the deal, he would have given up a great deal more than he anticipated, and the buyer would have received an unagreed-to windfall.

11.3.2.2.2 Party Seeking Relief Does Not Bear the Risk of the Mistake Assume a weekend browser sees a painting sitting on the floor of an antique shop. The owner says, “That old thing? You can have it for $100.” The browser takes it home, dusts it off, and hangs it on the wall. A year later a visitor, an expert in art history, recognizes the hanging as a famous lost El Greco worth $1 million. The story is headlined; the antique dealer is chagrined and claims the contract for sale should be voided because both parties mistakenly thought they were dickering over an “old, worthless” painting. The contract is valid. The owner is said to bear the risk of mistake because he contracted with conscious awareness of his ignorance: he knew he didn’t know what the painting’s possible value might be, but he didn’t feel it worthwhile to have it appraised. He gambled it wasn’t worth much, and lost.

11.3.3 Duress and Undue Influence

11.3.3.1 Duress When a person is forced to do something against his or her will, that person is said to have been the victim of duress There are two types of duress: physical duress and duress by improper threat.

11.3.3.1.1 Physical Duress If a person is forced into entering a contract on threat of physical bodily harm, he or she is the victim of physical duress. It is defined by the Restatement (Second) of Contracts in Section 174: “If conduct that appears to be a manifestation of assent by a party who does not intend to engage in that conduct is physically compelled by duress, the conduct is not effective as a manifestation of assent.” A contract induced by physical violence is void. [45]

11.3.3.1.2 Duress by Economic Threat The second kind of duress is duress by economic threat; it is more common than physical duress. Here the perpetrator threatens the victim economically, who feels there is no reasonable alternative but to assent to the contract. It renders the contract voidable. This rule contains a number of elements.

First, the threat must be improper. Second, there must be no reasonable alternative. If, for example, a supplier threatens to hold up shipment of necessary goods unless the buyer agrees to pay more than the contract price, this would not be duress if the buyer could purchase identical supplies from someone else. Third, the test for inducement is subjective. It does not matter that the person threatened is unusually timid or that a reasonable person would not have felt threatened. The question is whether the threat in fact induced assent by the victim. Such facts as the victim’s belief that the threatener had the ability to carry out the threat and the length of time between the threat and assent are relevant in determining whether the threat did prompt the assent.

There are many types of improper threats that might induce a party to enter into a contract: threats to commit a crime or a tort (e.g., bodily harm or taking of property), to instigate criminal prosecution, to instigate civil proceedings when a threat is made in bad faith, to breach a “duty of good faith and fair dealing under a contract with the recipient,” or to disclose embarrassing details about a person’s private life.

Jack buys a car from a local used-car salesman, Mr. Olson, and the next day realizes he bought a lemon. He threatens to break windows in Olson’s showroom if Olson does not buy the car back for $2,150, the purchase price. Mr. Olson agrees. The agreement is voidable, even though the underlying deal is fair, if Olson feels he has no reasonable alternative and is frightened into agreeing. Suppose Jack knows that Olson has been tampering with his cars’ odometers, a federal offense, and threatens to have Olson prosecuted if he will not repurchase the car. Even though Olson may be guilty, this threat makes the repurchase contract voidable, because it is a misuse for personal ends of a power (to go to the police) given each of us for other purposes. If these threats failed, suppose Jack then tells Olson, “I’m going to haul you into court and sue your pants off.” If Jack means he will sue for his purchase price, this is not an improper threat, because everyone has the right to use the courts to gain what they think is rightfully theirs. But if Jack meant that he would fabricate damages done him by a (falsely) claimed odometer manipulation, that would be an improper threat. Although Olson could defend against the suit, his reputation would suffer in the meantime from his being accused of odometer tampering.

11.3.3.2 Undue Influence The Restatement of Contracts (Second) characterizes undue influence as “unfair persuasion.” [46] It is a milder form of duress than physical harm or threats. The unfairness does not lie in any misrepresentation; rather, it occurs when the victim is under the domination of the persuader or is one who, in view of the relationship between them, is warranted in believing that the persuader will act in a manner detrimental to the victim’s welfare if the victim fails to assent. It is the improper use of trust or power to deprive a person of free will and substitute instead another’s objective. Usually the fact pattern involves the victim being isolated from receiving advice except from the persuader. Falling within this rule are situations where, for example, a child takes advantage of an infirm parent, a doctor takes advantage of an ill patient, or a lawyer takes advantage of an unknowledgeable client. If there has been undue influence, the contract is voidable by the party who has been unfairly persuaded. Whether the relationship is one of domination and the persuasion is unfair is a factual question. The answer hinges on a host of variables, including “the unfairness of the resulting bargain, the unavailability of independent advice, and the susceptibility of the person persuaded.” [47]

11.3.4 Illegal Contracts

11.3.4.1 Contracts that violate a statute Any bargain that violates the criminal law— including statutes that govern extortion, robbery, embezzlement, forgery, some gambling, licensing, and consumer credit transactions—is illegal. Thus determining whether contracts are lawful may seem to be an easy enough task. Clearly, whenever the statute itself explicitly forbids the making of the contract or the performance agreed upon, the bargain (such as a contract to sell drugs) is unlawful. But when the statute does not expressly prohibit the making of sthe contract, courts examine a number of factors.

11.3.4.2 Unconscionable contracts Courts may refuse to enforce unconscionable contracts, those that are shockingly one-sided, unfair, the product of unequal bargaining power, or oppressive; a court may find the contract divisible and enforce only the parts that are not unconscionable.

The common-law rule is reflected in Section 208 of the Restatement: “If a contract or term thereof is unconscionable at the time the contract is made a court may refuse to enforce the contract, or may enforce the remainder of the contract without the unconscionable term, or may so limit the application of any unconscionable term as to avoid any unconscionable result.”

Unconscionability may arise procedurally or substantively. A term is procedurally unconscionable if it is imposed upon the “weaker” party because of fine or inconspicuous print, unexpected place- ment in the contract, lack of opportunity to read the term, lack of education or sophistication that precludes understanding, or lack of equality of bargaining power. Substantive unconscionability arises where the affected terms are oppressive and harsh, where the term deprives a party of any real remedy for breach. Most often—but not always—courts find unconscionable contracts in the context of consumer transactions rather than commercial transactions. In the latter case, the assumption is that the parties tend to be sophisticated businesspeople able to look out for their own contract interests.

11.3.5 Specific Contractual Pitfalls

Courts have long held that public policy disfavors attempts to contract out of tort liability. Exculpatory clauses that exempt one party from tort liability to the other for harm caused intentionally or recklessly are unenforceable without exception. A contract provision that exempts a party from tort liability for negligence is unenforceable under two general circumstances: (1) when it “exempts an employer from liability to an employee for injury in the course of his employment” or (2) when it exempts one charged with a duty of public service and who is receiving compensation from liability to one to whom the duty is owed. [48] Contract terms with offensive exculpatory clauses may be considered somewhat akin to unconscionability.

Put shortly, exculpatory clauses are okay if they are reasonable. Put not so shortly, exculpatory clauses will generally be held valid if (1) the agreement does not involve a business generally thought suitable for public regulation (a twenty-kilometer bicycle race, for example, is probably not one thought generally suitable for public regulation, whereas a bus line is); (2) the party seeking exculpation is not performing a business of great importance to the public or of practical necessity for some members of the public; (3) the party does not purport to be performing the service to just anybody who comes along (unlike the bus line); (4) the parties are dealing at arms’ length, able to bargain about the contract; (5) the person or property of the purchaser is not placed under control of the seller, subject to his or his agent’s carelessness; or (6) the clause is conspicuous and clear. [49]

Another broad area in which public policy intrudes on private contractual arrangements is that of undertakings between couples, either prior to or during marriage. Marriage is quintessentially a relation- ship defined by law, and individuals have limited ability to change its scope through legally enforceable contracts. Moreover, marriage is an institution that public policy favors, and agreements that unreasonably restrain marriage are void. Thus a father’s promise to pay his twenty-one-year-old daughter $100,000 if she refrains from marrying for ten years would be unenforceable. However, a promise in a postnuptial (after marriage) agreement that if the husband predeceases the wife, he will provide his wife with a fixed income for as long as she remains unmarried is valid because the offer of support is related to the need.

Finally, a promise by an employee not to compete with his or her former employer is scrutinized carefully by the courts, and an injunction [50] will be issued cautiously, partly because the prospective employee is usually confronted with a contract of adhesion [51] and is in a weak bargaining position compared to the employer, and partly because an injunction might cause the employee’s unemployment. Many courts are not enthusiastic about employment noncompete agreements. The California Business and Professions Code provides that “every contract by which anyone is restrained from engaging in a lawful profession, trade, or business of any kind is to that extent void.” [52] As a result of the statute, and to promote entrepreneurial robustness, California courts typically interpret the statute broadly and refuse to enforce noncompete agreements. Other states are less stingy, and employers have attempted to avoid the strictures of no-enforcement state rulings by providing that their employment contracts will be interpreted according to the law of a state where noncompetes are favorably viewed.

11.3.6 Ways to Resolve Ambiguity

As any reader knows, the meaning of words depends in part on context and in part on the skill and care of the writer. As Justice Oliver Wendell Holmes Jr. once succinctly noted, “A word is not a crystal, transparent and unchanged; it is the skin of a living thought and may vary greatly in color and content according to the circumstances and the time in which it is used.” [53] Words and phrases can be ambiguous, either when they stand alone or when they take on a different coloration from words and phrases near them. A writer can be careless and contradict himself without intending to; people often read hurriedly and easily miss errors that a more deliberate perusal might catch. Interpretation difficulties can arise for any of a number of reasons: a form contract might contain language that is inconsistent with provisions specifically annexed; the parties might use jargon that is unclear; they might forget to incorporate a necessary term; assumptions about prior usage or performance, unknown to outsiders like judges, might color their understanding of the words they do use. Because ambiguities do arise, courts are frequently called on to give content to the words on paper.

Courts attempt to give meaning to the parties’ understanding when they wrote the contract. The intention of the parties governs, and if their purpose in making the contract is known or can be ascertained from all the circumstances, it will be given great weight in determining the meaning of an obscure, murky, or ambiguous provision or a pattern of conduct. A father tells the college bookstore that in consideration of its supplying his daughter, a freshman, with books for the coming year, he will guarantee payment of up to $350. His daughter purchases books totaling $400 the first semester, and he pays the bill. Midway through the second semester, the bookstore presents him with a bill for an additional $100, and he pays that. At the end of the year, he refuses to pay a third bill for $150. A court could construe his conduct as indicating a purpose to ensure that his daughter had whatever books she needed, regardless of cost, and interpret the contract to hold him liable for the final bill.

The policy of uncovering purpose has led to a number of tools of judicial interpretation:

For an example of resolving ambiguity by construing against, the drafter, see Grove v. Charbonneau Buick-Pontiac, Inc. in the Cases section.

The common law protects the voluntary aspect of contract law by policing various ways in which free will may not be manifest in an agreement. These are doctrines such as mistake, duress, and undue influence. It also provides methods to avoid unconscionable exchanges, methods to stop illegal contracts from being enforced, and ways to interpret situations in which the parties’ intent is unclear.