> In many jurisdictions of the United States, promissory estoppel is an alternative to consideration as a basis for enforcing a promise. It is also sometimes called detrimental reliance.

Wiki: https://en.wikipedia.org/wiki/Estoppel#Promissory_estoppel_2

PDF: https://chicagounbound.uchicago.edu/cgi/viewcontent.cgi?refe...