Concurrent Promises Law and Legal Definition

Concurrent promises are those where the acts to be performed are simultaneous; and either party may sue the other for a breach of the contract, on showing, either that he was able, ready, and willing to do his act at a proper time and in a proper way, or that he was prevented by the act or default of the other contracting party. [Dermott v. Jones, 64 U.S. 220 (U.S. 1860)].