Except as otherwise provided by statute, a public employee is not liable for an injury caused by the act or omission of another person. Nothing in this section exonerates a public employee from liability for injury proximately caused by his own negligent or wrongful act or omission. Ca. Gov. Code § 820.8 Added by Stats. 1963, Ch. 1681.

Proof of service by mail may be made by one of the following methods: (1) An affidavit setting forth the exact title of the document served and filed in the cause, showing the name and residence or business address of the person making the service, showing that he or she is a resident of or employed in the county where the mailing occurs, that he or she is over the age of 18 years and not a party to the cause, and showing the date and place of deposit in the mail, the name and address of the person

Joint Liability An obligation imposed upon several persons, or a right created in favor of several persons, is presumed to be joint, and not several, except as provided in Section 1431.2, and except in the special cases mentioned in the title on the interpretation of contracts. This presumption, in the case of a right, can be overcome only by express words to the contrary. Ca. Civ. Code § 1431 Amended June 3, 1986, by initiative Proposition 51, Sec. 2. Note: Prop. 51 (the Fair Responsibility Act

(a) In case of service by mail, the notice or other paper shall be deposited in a post office, mailbox, subpost office, substation, or mail chute, or other like facility regularly maintained by the United States Postal Service, in a sealed envelope, with postage paid, addressed to the person on whom it is to be served, at the office address as last given by that person on any document filed in the cause and served on the party making service by mail; otherwise at that party's place of residence.