California Code, Revenue and Taxation Code - RTC § 17944

(a) The effective date of dissolution, withdrawal, or cancellation of a limited liability company is the date on which the certified copy of the court decree, judgment, or order declaring the limited liability company duly wound up and dissolved is filed in the office of the Secretary of State or the date on which the certificate of winding up and dissolution is filed in the office of the Secretary of State. For the purposes of this chapter, the effective date of cancellation of registration of a foreign limited liability company is the date on which the certificate of cancellation of registration is filed in the office of the Secretary of State.

(b) The Secretary of State shall, through an information program and by forms and instructions, recommend that all required documents filed with the Secretary of State be sent, if mailed, by certified mail with return receipt requested. The Secretary of State shall also notify persons that receipt of documents by the Secretary of State will be acknowledged within 21 days of receipt.

(c) On or before 21 days after their receipt, the Secretary of State shall provide a payer with acknowledgment of the receipt of documents submitted by a limited liability company pursuant to this chapter.