27287. Acknowledgment of execution or proof by subscribing witness required before recording; exceptions

… before an instrument can be recorded its execution shall be acknowledged by the person executing it, or if executed by a corporation, by its president or secretary or other person executing it on behalf of the corporation, or, except for any power of attorney, quitclaim deed, grant deed, mortgage, deed of trust, security agreement, or other document affecting real property, proved by subscribing witness or as provided in Sections 1198 and 1199 of the Civil Code, and the acknowledgment or proof certified as prescribed by law. This section shall not apply to a trustee's deed resulting from a decree of foreclosure, or a nonjudicial foreclosure pursuant to Section 2924 of the Civil Code, or to a deed of reconveyance.