Any assignment that would materially alter the duties of the promisor is unenforceable, because the promisor cannot be required to do something significantly more than, or different from, what he or she originally agreed to do.

Question

Quizplus · Accepted Answer

This statement is true. This principle is known as the preexisting duty rule, and it applies in both common law and the Uniform Commercial Code (UCC). It means that a party cannot demand additional compensation or benefits for performing duties or obligations that they were already obligated to fulfill under an existing contract or agreement.

Any Assignment That Would Materially Alter the Duties of the Promisor