When parties move toward a binding agreement, the path from initial discussions to a fully formed contract is rarely smooth. Defenses to contract formation exist to protect individuals from agreements that are fundamentally unfair, misunderstood, or coerced. These legal doctrines ensure that the law does not enforce every promise simply because it was spoken or written, but rather those promises that meet specific standards of consent and legitimacy.
Lack of Genuine Assent
Genuine assent is the cornerstone of any valid agreement, and the law recognizes several ways in which this essential element can be missing. If one party is mistaken about a basic assumption that has a material effect on the agreed exchange, courts may grant relief. A common scenario involves a misunderstanding about the subject matter itself, such as both parties envisioning different objects or services, rendering the contract voidable by the misinformed party.
Duress, Undue Influence, and Fraud
Assent can be vitiated not just by mistake, but by improper pressure or deception. Duress involves threats of imminent physical harm or unlawful confinement that leaves no reasonable alternative but to agree. Undue influence applies in relationships of trust, such as between attorney and client or caregiver and elder, where one party exploits a position of power to secure an unconscionable bargain. Fraudulent misrepresentation, whether intentional or through reckless disregard for the truth, also destroys genuine assent by inducing a party to enter a contract based on false statements of fact.
Illegality and Public Policy
Even if all parties are fully aware and willingly agree, a contract can be unenforceable if its very purpose contradicts the law or fundamental societal values. An agreement to commit a crime, such as hiring someone to commit assault, is inherently void. Similarly, contracts that violate statutes designed to regulate specific industries, like licensing requirements for certain professions, are typically invalid from the outset.
Capacity and Legality of Subject Matter
For a contract to be binding, the parties themselves must be legally capable of entering into an agreement. Minors generally lack the capacity to be bound by most contracts, and any such agreement is usually voidable at the minor’s discretion. Individuals who are mentally incapacitated at the time of formation also lack the necessary capacity. Furthermore, the subject matter of the contract must be legal; an agreement to perform an act that is impossible in itself, such as contracting to sell the moon, or to violate a statutory monopoly, will not be enforced.
The Requirement of Consideration
Consideration is the legal term for the exchange of something of value between the parties, which serves as the primary engine of contract formation. A promise to perform an act that one is already legally obligated to do is not valid consideration. Similarly, a promise made as a gift, without any corresponding benefit or detriment, generally does not satisfy this requirement. Past consideration, or a benefit already conferred before the promise was made, is also typically insufficient to form a new contract, though there are specific exceptions in areas like promissory estoppel.
