Below are some of the most common forms for requesting, enforcing and ending child support. Through a process called a "modification" your child support order can be reviewed to see if changing your monthly child support amount is appropriate.Our Resource Center can assist self-represented litigants with requesting, modifying, and terminating child support through their family law cases. The San Bernardino County Department of Child Support Services determines parentage, establishes and enforces child support orders, and secures payments. You can petition the court for child support modification or request that the local child support agency review your existing agreement. To file your request, review the instructions worksheet, then complete the Motion to Modify Child Support and the necessary Financial Statement. Changing Your Child Support Order : A modification is a change to the terms or amount of the support order. In California, and most other states, no court is authorized to modify a support order for any time perior prior to the filing date of such a request. Form unless you can locate the other parent. The San Bernardino County Department of Child Support Services determines parentage, establishes and enforces child support orders, and secures payments.