California Code, Corporations Code - CORP § 6211

(a) An agent designated for service of process pursuant to Section 6210 may deliver to the Secretary of State, on a form prescribed by the Secretary of State for filing, a signed and acknowledged written statement of resignation as an agent for service of process containing the name of the corporation, the Secretary of State's file number of the corporation, the name of the resigning agent for service of process, and a statement that the agent is resigning. Thereupon the authority of the agent to act in that capacity shall cease and the Secretary of State forthwith shall mail or otherwise provide written notice of the filing of the statement of resignation to the corporation at its principal office.

(b) The resignation of an agent may be effective if, on a form prescribed by the Secretary of State containing the name of the corporation, the Secretary of State's file number for the corporation, and the name of the agent for service of process, the agent disclaims having been properly appointed as the agent. Similarly, a person named as an officer or director may indicate that the person was never properly appointed as the officer or director.

(c) The Secretary of State may destroy or otherwise dispose of any resignation filed pursuant to this section after a new form is filed pursuant to Section 6210 replacing the agent for service of process that has resigned.