3. Enforceability of promises: consideration and promissory estoppel

Abstract

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.