California Code, Family Code - FAM § 7666

(a) Except as provided in subdivision (b), notice of the proceeding shall be given to every person identified as the biological father or a possible biological father in accordance with the Code of Civil Procedure for the service of process in a civil action in this state at least 10 days before the date of the proceeding, except that publication or posting of the notice of the proceeding is not required, and service on the parent or guardian of a biological father or possible biological father who is a minor is not required unless the minor has previously provided written authorization to serve the minor's parent or guardian. Proof of giving the notice shall be filed with the court before the petition is heard.

(b) Notice to a man identified as or alleged to be the biological father is not required, and the court shall issue an order dispensing with that notice under any of the following circumstances: