California Code, Code of Civil Procedure - CCP § 720.340

(a) In a case where the creditor petitions for a hearing on the third-party claim, the creditor shall file the statement with the court at the time the petition is filed and shall serve a copy thereof on the secured party with notice of the hearing served pursuant to Section 720.320.

(b) In a case where the secured party has petitioned for a hearing on the third-party claim, the creditor shall file the statement with the court and serve a copy of the statement on the secured party not later than five days before the date set for the hearing. Service shall be made personally or by mail.