Order (Relief from Support Payments and Commitment). PDF. 4-16. Notice of Motion To Quash, Fix or Modify Conditions of A Child Support Subpoena.Clark Peshkin handles child support modification petitions every day. We can provide advice, help you file your petition, or shepherd you through the process. 1. Fill out a child support modification petition. 2. File the petition with the Family Court that most recently established your order. 3. File the ORIGINAL Proof of Mailing or Hand Deliver form with the Clerk. Make a copy for yourself and date stamp the copy. A modification of a child support order may be requested if there has been a substantial change of circumstances since the order was entered. This form is required if you are asking to change any financial orders, such as child support.