Which term refers to additional clauses added to a contract post-signing that clarify rights and responsibilities?

The term that refers to additional clauses added to a contract after it has been signed, which serve to clarify rights and responsibilities, is known as an addendum. An addendum is essentially a document that is appended to the original contract and modifies specific terms without invalidating the entire contract. This allows the parties involved to clarify or expand upon responsibilities, obligations, or any other aspects of the agreement that may need further explanation as circumstances evolve.

Modifications typically refer to changes made to the existing provisions of a contract rather than adding entirely new terms. Supplements are more commonly understood in a different context, often relating to additional documents that do not specifically alter the original contract but provide extra information or guidance. Conditions refer to clauses that outline specific events or circumstances that would trigger certain obligations under the contract, rather than serving the purpose of enhancing clarity post-signature. Thus, using an addendum is the most appropriate way to address changes or clarifications in a signed contract.