When a local child support agency is providing services as required by Family Code section 17400, that agency may appear in any action or proceeding that it did not initiate by giving written notice to all parties, on Notice Regarding Payment of Support (form FL-632) , that it is providing services in that action or proceeding under title IV-D of the Social Security Act. The agency must file the original of the notice in the action or proceeding with proof of service by mail on the parties. On service and filing of the notice, the court must not require the local child support agency to file any other notice or pleading before that agency appears in the action or proceeding.
Cal. R. Ct. 5.360