1. Fill out a child support modification petition. 2. File the petition with the Family Court that most recently established your order. 3.You may fill them out at home or at the courthouse. Please read the forms carefully as some have a "Verification" page. Forms; Motion And Notice Of Hearing For Modification Of Child Support Order. By North Carolina Judicial Branch. Order (Relief from Support Payments and Commitment). PDF. 4-16. Notice of Motion To Quash, Fix or Modify Conditions of A Child Support Subpoena. Instructions: Please COMPLETELY fill out the contact information for both parties and attorneys. There are no "forms" for a modification of child support.