Alameda County Department of Child Support Services (DCSS) will use legal processes to modify an order for child and or medical support. How to fill out the Sample Form Letter for Child Support Modification?Forms. Apply for Services. Download a free child support modification form to propose changes to a current child support agreement. Available in PDF or Word format. Download a free child support modification form to propose changes to a current child support agreement. Available in PDF or Word format. The only matters that can or will be addressed will be as stated in the petition. Sample Notice Letter under Indian Child Welfare Act. Schedule a pickup or bring your donations to The Salvation Army.