Consent by Both Parties to the Alteration of an Instrument Made After Execution

An alteration of a written instrument is a change in language of the instrument that is made by one of the parties to the instrument who is entitled to make the change. Any material alteration of a written instrument, after its execution, made by the owner or holder of the instrument, without the consent of the party to be charged, renders the instrument void as to the nonconsenting party. The party to be charged refers to that party or parties against whom enforcement of a contract or instrument is sought. If a party consents to the alteration, the instrument will not be rendered invalid as to that party.