Child support enforcement is implemented by Local Child Support Agency Offices. To file a complaint parents should fill in a form including all necessary information:
Send via mail to:
Department of Child Support Services
P.O. Box 419064
Rancho Cordova, CA 95741-9064
Bring personally to Local Child Support Agency Offices.
If you have any questions or queries you can contact the Department on the website: www.childsup.ca.gov
Or by phone: 1-866-901-3212