Box 1: Print the county in which you are filing your petition. See "Where do I. File?" in the Introduction for more information about what county you.Petition for Modification. These are the official forms for use in Family Court proceedings. An overview of modifications to child support agreements and reasons that the court would consider them. Use this program to ask (or "petition") the Family Court to change a support order if there is a "change in circumstances." Each of the documents listed below inculde a blank form and the instructions to fill out that form. This form must be filled out and filed with the Custody Complaint and the Petition for Modification of Custody Order. Criminal Record Abuse History Verification Petition for Modification: this paperwork is solely for the purpose of requesting changes be made to your current custody order.