A contract is usually discharged by performance of the terms of the agreement. However, the parties may agree to a different performance. This is called an accord. When the accord is performed, this is called an accord and satisfaction. The original obligation is discharged.
In order for there to be an accord and satisfaction, there must be
(1) a bona fide dispute;
(2) an agreement to settle the dispute; and
(3) the performance of the agreement.