California Code, Civil Code - CIV § 882.030

Expiration of the lien of a mortgage, deed of trust, or other security interest pursuant to this chapter or any other statute renders the lien unenforceable by any means commenced or asserted thereafter and is equivalent for all purposes to a certificate of satisfaction, reconveyance, release, or other discharge of the security interest, and execution and recording of a certificate of satisfaction, reconveyance, release, or other discharge is not necessary to terminate or evidence the termination of the security interest. Nothing in this section precludes execution and recording at any time of a certificate of satisfaction, reconveyance, release, or other discharge.