❑STEP 1 : Fill out the Petition for Modification of Child Support. Qualified Medical Child Support Order.Use this program to ask (or "petition") the Family Court to change a support order if there is a "change in circumstances." 1. Fill out a child support modification petition. 2. File the petition with the Family Court that most recently established your order. 3. You will need to complete and file the Child Custody Modification form with the Superior Court of Fulton County. The Review and Adjustment process can take several months to complete from the initial request to final order. You are seeking to terminate support for an emancipated child. Petition For Modification Of Child Support Form. This is a Georgia form and can be use in Fulton Local County.