Poole’s Casebook on Contract Law provides a comprehensive selection of case law that addresses all aspects of the subject encountered on undergraduate courses. In order to be enforceable, a promise must either be supported by consideration or be expressed in the form of a deed. This stems from the assumption in English contract law that only bargains should be enforced. This chapter examines the enforceability of promises, focusing on consideration and promissory estoppel. The case law has addressed what can constitute consideration and whether a promise can be enforced in the absence of consideration. The chapter focuses particularly on the enforceability of alteration promises, discusses part-payment of a debt, when and how the doctrine of promissory estoppel will operate, and how far the doctrine can be extended.
Chapter
3. Enforceability of promises: consideration and promissory estoppel
Robert Merkin KC, Séverine Saintier, and Jill Poole
Chapter
3. Enforceability of promises: consideration and promissory estoppel
Robert Merkin KC, Séverine Saintier, and Jill Poole
Course-focused and comprehensive, Poole’s Textbook on Contract Law provides an accessible overview of the key areas of the law curriculum. Under English law, bargains and not gratuitous promises are enforced, thus a promise will not be enforceable if it is not contained in a deed (implying that any promise is taken seriously) or supported by consideration. Consideration refers to an act or a promise given in exchange for the promise (that is, the price for which the other’s promise was bought). The law does not recognize some acts or promises as good consideration, such as past consideration and performance of an existing legal duty. This chapter examines the general requirement in English law to provide consideration in order to enforce a contractual promise. The consideration requirement is relevant not only to the formation of a contract but also to the enforceability of promises altering the terms of an existing contract (alterations). An alteration promise that is not supported by consideration may still have some binding effect on the basis of the doctrine of promissory estoppel.
