Cal. Veh. Code § 4157

In the absence of the regularly required supporting evidence of ownership upon application for registration or transfer of a vehicle, the department may accept an undertaking or bond which shall be conditioned to protect the department and all officers and employees thereof and any subsequent purchaser of the vehicle, any person acquiring a lien or security interest thereon, or the successor in interest of such purchaser or person against any loss or damage on account of any defect in or undisclosed claim upon the right, title, and interest of the applicant or other person in and to the vehicle.