California Code, Insurance Code - INS § 515

(a)(1) Notwithstanding any other law, an insurer issuing policies of automobile liability insurance or motor vehicle liability insurance shall, upon request of either the named insured or the Department of Motor Vehicles, promptly issue to that person or the department written verification as to the existence of that coverage.

(2) Upon the request of the insured, an insurer may issue the verification as to the existence of that coverage in an electronic format to a mobile electronic device to the extent available.  This section does not require an insurer to provide the verification of coverage in an electronic format in real time.