What is required to modify a contract under the common law?
Under the common law, contract modifications MUST be supported by consideration.
What is the common law “preexisting duty rule”?
The common law follows the preexisting duty rule, which means that a promise to do something that a party is already legally obligated to do (by contract or otherwise) is NOT CONSIDERATION.
Under the UCC, is consideration required to modify a contract?
Under the UCC, there is no consideration requirement. A contract modification is valid if it is made in good faith.
Does the UCC apply the preexisting duty rule?
No