This page includes information and forms for modifying child support in an existing divorce, custody or parentage order. (Check this box and complete this section only if you are asking to change payment of child care.Complete this form to provide ORS with the information needed to open a child support services case. This form can also be completed online. Explore comprehensive child support modification forms and procedures for navigating child support changes and custody modifications effectively. Mail completed form to: Office of Recovery Services, PO Box 45033, Salt Lake City,. To modify a child support order, you may take one of two approaches: Filing a Motion to Modify Child Support or filing a Petition to Modify Child Support. There are two ways to ask the court to change child support a Motion to Adjust and a Petition to Modify. There are two ways to ask the court to change child support a Motion to Adjust and a Petition to Modify. You should be able to file online through Pennsylvania Child Support Enforcement System (PACSES) website.