California Code, Corporations Code - CORP § 118

(a) The time a written notice by mail is deposited in the United States mails, postage prepaid.

(b) The time any other written notice, including facsimile, telegram, or electronic mail message, is personally delivered to the recipient or is delivered to a common carrier for transmission, or actually transmitted by the person giving the notice by electronic means, to the recipient.

(c) The time any oral notice is communicated, in person or by telephone, including a voice messaging system or other system or technology designed to record and communicate messages, or wireless, to the recipient, including the recipient's designated voice mailbox or address on the system, or to a person at the office of the recipient who the person giving the notice has reason to believe will promptly communicate it to the recipient.