Promissory Estoppel occurs when there is no formal contract, but a promise is made with clear terms, a party relies on that promise, such reliance was reasonable and foreseeable, and the party is injured as a result of the reliance. This concept is also known as detrimental reliance. It is difficult to prove; courts will usually grant promissory estoppel only in clear cases of injustice.
For more detailed information, see our related Contracts terms: