Use these forms to file for a modification to a child support order in Ohio. You can only use these forms if you have an existing child support order.Parents or guardians can ask for changes in a 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. Instructions: This form is used to request a change in the child support or child support-related matters. 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. A parent's change in circumstances may support a request to change or modify the amount of child support payments you receive or owe. Either parent or guardian can ask for a change in the order.