Fill in the date of the order now in effect, and the names of all children named in the order. 1- Complete the Petition to the best of your knowledge including names and date of Current Court Order.If you pay support, you are the Defendant. Us as a payee or payor and submit a Petition for Modification through E-Services. There are four (4) pages that must be completed and returned to the Domestic Relations Office to file your Petition for Modification. You may file a Petition for Modification, provide a copy of your current support order. To Pa.R.C.P. No. 1915.3-2. WHEREFORE, Petitioner requests that the Court modify the existing Order because it will be in the best interest of the child(ren). When filling out these forms, you are given several options for the type(s) of custody you are seeking. Modifications to child support will not happen automatically.