If you prepare your own petition, file it with the Clerk of Family Court on the 11th floor of the courthouse at. Each of the documents listed below inculde a blank form and the instructions to fill out that form.Upon completing all the necessary forms for your complaint or petition, you should make two copies and file all three with the Prothonotary's office. Jurisdiction – Your child must have lived in the county for at least 6 months before the court in that county will. 1. File for custody. You may file in the family court or a court of a different name that hears custody cases. The following forms can be printed and submitted to your county DRS. Read the descriptions to determine which forms are appropriate for your needs. Use the form with the arrowboxes to guide you through filling out the blank form. 1. Helpful (0) Helpful (0) 2 lawyers agree. Answer.