Cal. Fam. Code § 4412

On the filing of a petition under this chapter, the clerk shall set the matter for hearing by the court and shall issue a citation, stating the time and place of the hearing, directed to the parent and to the parent’s conservator, if any, or, if the parent is deceased, the personal representative of the parent’s estate. At least five days before the date of the hearing, the citation and a copy of the petition shall be personally served on each person to whom it is directed, in the same manner as provided by law for the service of summons.