California Code, Code of Civil Procedure - CCP § 1268.120

If the deposit is made under Section 1268.110 prior to apportionment of the award, the plaintiff shall serve a notice that the deposit has been made on all of the parties who have appeared in the proceeding. If the deposit is made after apportionment of the award, the plaintiff shall serve a notice that the deposit has been made on all of the parties to the proceeding determined by the order apportioning the award to have an interest in the money deposited. The notice of deposit shall state that a deposit has been made and the date and the amount of the deposit. Service of the notice shall be made in the manner provided in Section 1268.220 for the service of an order for possession. Service of an order for possession under Section 1268.220 is sufficient compliance with this section.