To file your request, review the instructions worksheet, then complete the Motion to Modify Child Support and the necessary Financial Statement. Download a free child support modification form to propose changes to a current child support agreement.Available in PDF or Word format. Yes, you can write your child support modification letter using our templates or form builder, which will guide you through the creation process. This document is a sample form letter designed for individuals seeking a downward modification of their child support obligations. Use this instruction form for cases including child custody, visitation, child support, divorce, alimony, name change, contempt, and guardianship. To file such a motion, you generally need to explain the change in circumstances that have taken place which warrant changing the current support order. Your former spouse did nothing wrong in your name. Application for Child Support Services. It is not so hard if you go fill out paperwork from the court.