An oral or written statement purporting to waive, release, impair or otherwise adversely affect a lien or claim is void and unenforceable and does not create an estoppel or impairment of the lien or claim unless either of the following conditions is satisfied:
(a) The statement is pursuant to a waiver and release under this article.
(b) The claimant has actually received payment in full for the claim.
(Added by Stats. 2010, Ch. 697, Sec. 20. (SB 189) Effective January 1, 2011. Operative July 1, 2012, by Sec. 105 of Ch. 697 and by Section 8052.)