Cal. Ins. Code § 11104

Every society authorized to do business in this State shall appoint in writing the commissioner and each successor in office to be its true and lawful attorney upon whom all lawful process in any action or proceeding against it shall be served, and shall agree in such writing that any lawful process against it which is served on said attorney shall be of the same legal force and validity as if served upon the society, and that the authority shall continue in force so long as any liability remain outstanding in this State. Copies of such appointment, certified by said commissioner, shall be deemed sufficient evidence thereof and shall be admitted in evidence with the same force and effect as the original thereof might be admitted.