Cal. Code of Civil Procedure § 1255.020

(a) On making a deposit pursuant to Section 1255.010, the plaintiff shall serve a notice of deposit on all parties who have appeared in the proceeding and file with the court a proof of service together with the notice of deposit. The plaintiff shall so serve parties who appear thereafter on their appearance. 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 of deposit shall be made in the manner provided in Section 1255.450 for service of an order for possession. (b) The notice of deposit shall be accompanied by a written statement or summary of the basis for the appraisal referred to in Section 1255.010. (c) If the plaintiff has obtained an order under Section 1255.010 deferring completion of the written statement or summary, the plaintiff: (1) On making the deposit, shall comply with subdivision (a) and include with the notice a copy of all affidavits on which the order was based. (2) Upon completion of the written statement or summary, shall comply with subdivision (b).