Cal. INS § 651

Whenever an insurer gives notice of rescission of an automobile liability policy, upon request of the driver, the insurer, within 15 days of receipt of the request, shall furnish to the insured a statement setting forth the ground or grounds upon which the notice of rescission is based. There shall be no liability on the part of, and no cause of action shall arise against, any insurer or authorized representative, or its licensed investigative sources, for any statements made by them in a written notice required to be given pursuant to this section. If the insurer fails to comply with the provisions of this section, the insured may apply to the commissioner for a certificate of the facts or information desired. Any such request shall be made in accordance with Article 3 (commencing with Section 12950) of Chapter 2 of Division 3, and the commissioner shall exercise any power conferred upon him by that article as may be necessary to ensure compliance with this section.