This chapter covers the exceptions to the rule requiring consideration. Here are the key exceptions, situations in which a promise can be enforceable even though there is no consideration for it:
Promises to pay past debt: Most courts hold that a promise to pay a past debt that is no longer legally enforceable is binding without consideration, if it is in writing.
Promise to pay for benefits received: Similarly, a promise to pay for services already received is enforceable in many situations.
Modification: The UCC provides that a modification of a contract for the sale of goods does not have to be supported by consideration.
Option contract: An option contract (i.e., a promise to hold an offer open for a set amount of time) usually does not need consideration, if the option is in a writing signed by the offeror, and recites that consideration has been paid for the option.
Guaranty contract: A guaranty (i.e., a promise to pay the already-existing debt of another person) is usually enforceable if it is in a writing that (1) is signed by the guarantor, and (2) states that consideration has been paid for the guarantee.
Promissory estoppel: Under the “promissory estoppel” doctrine, a promise will be enforceable without consideration if: (1) the promisee acts or forbears in reliance on the promise and (2) this action or forbearance was reasonably foreseeable by the promisor. The doctrine is often applied in a situation where there has been a promise to make a gift.