Download a free child support modification form to propose changes to a current child support agreement. Available in PDF or Word format.IF MODIFYING CHILD SUPPORT: Changed circumstances exist such that a change in support is justified. This document is a sample form letter designed for individuals seeking a downward modification of their child support obligations. If you are requesting to modify a child support order, explain what the prior court order specified and write the date the child support was filed on. To begin the process, ask our office to review your case for modification. 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. Due to changes in California law, please be advised of upcoming developments in the distribution of child support money. You may have questions about how child support payments and orders can be modified. Here's some information that can help.