Cal. Corp. Code § 8021
Whenever a domestic or foreign or foreign business corporation or other business entity (Section 5063.5) having any real property in this state merges with another domestic or foreign or foreign business corporation or other business entity pursuant to the laws of this state or of the state or place in which any constituent party to the merger was organized, and the laws of the state or place of organization (including this state) of any disappearing party to the merger provide substantially that the making and filing of the agreement of merger vests in the surviving party to the merger all the real property of any disappearing party to the merger, the filing for record in the office of the county recorder of any county in this state in which any of the real property of the disappearing party to the merger is located of either (a) a certificate prescribed by the Secretary of State, or (b) a copy of the agreement of merger or certificate of merger, certified by the Secretary of State or an authorized public official of the state or place pursuant to the laws of which the merger is effected, shall evidence record ownership in the surviving party to the merger of all interest of such disappearing party to the merger in and to the real property located in that county.
Ca. Corp. Code § 8021