California Code, Family Code - FAM § 4610

(a) Subject to Sections 4613, 4614, and 4615, in any proceeding where the court has ordered either or both parents to pay any amount for the support of a child for whom support may be ordered, upon an order to show cause or notice of motion, application, and declaration signed under penalty of perjury by the person or county officer to whom support has been ordered to have been paid stating that the parent or parents so ordered is in arrears in payment in a sum equal to the amount of 60 days of payments, the court shall issue to the parent or parents ordered to pay support, following notice and opportunity for a hearing, an order requiring that the parent or parents deposit assets to secure future support payments with the deposit holder designated by the court.

(b) In a proceeding under this article, upon request of any party, the court may also issue an ex parte restraining order as specified in Section 4620.