Cal. Corp. Code § 2110
Delivery by hand of a copy of any process against a foreign corporation (a) to any officer of the corporation or its general manager in this state, or if the corporation is a bank to a cashier or an assistant cashier, (b) to any natural person designated by it as agent for the service of process, or (c), if the corporation has designated a corporate agent, to any person named in the latest certificate of the corporate agent filed pursuant to Section 1505 shall constitute valid service on the corporation. A copy of the statement and designation, or a copy of the latest statement filed pursuant to Section 2117, certified by the Secretary of State, is sufficient evidence of the appointment of an agent for the service of process.
Ca. Corp. Code § 2110