A family law attorney can help you to file or fight a petition to modify a divorce settlement agreement in Georgia. Learn about divorce decree modifications in Georgia including changes for child support, custody, visitation, property division, and more.STEP 1: Complete the Complaint for Modification of Child Support. Fill in your full name as the Plaintiff and the Defendant's full name. Explore modification of divorce decree in Georgia including changes for child support, custody, visitation, cost and more. You can file a petition for child custody in your county's Superior Court. If you are divorcing, the petition will be included in your divorce papers. Need to change your divorce settlement? We can help you to file for divorce modifications to amend your settlement for child support, custody and more. When a review is requested, it may take up to six months to complete the process.