Cal. Civil Code § 1542 : Extinction Of Obligations — California Civil Code — Obligations — Release — Claims not known by creditor at time of executing release Date: 14 Sep 2016 TEXT PDF Current through the 2016 Legislative Session A general release does not extend to claims which the creditor does not know or suspect to exist in his or her favor at the time of executing the release, which if known by him or her must have materially affected his or her settlement with the debtor. Ca. Civ. Code § 1542 Amended by Stats 2004 ch 183 (AB 3082),s 28, eff. 1/1/2005