Contact Court Administration in the county where your case is filed if you need to get a copy of your current child support order. Download a free child support modification form to propose changes to a current child support agreement.Available in PDF or Word format. This document is a sample form letter designed for individuals seeking a downward modification of their child support obligations. Most child support forms are available in several languages. Find the form you want and choose the language you need. In this chapter you will learn how to fill out the motion to modify child support form. 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. Modification means changing an existing court order. See Instructions on Completing the Sensitive Data Form near the end of this packet.