Introduction to representing yourself in Pennsylvania. Each of the documents listed below inculde a blank form and the instructions to fill out that form.This purpose of this packet is to provide you with the information and documents you may need to start or respond to child custody actions. Fill in the top part of this form with your name and address and the defendant's name and address. You are the plaintiff. Fill in the top part of this form with your name and address and the respondent's name and address. You are the petitioner. The custody petition forms will be available at your local courthouse. You may also be able to get the forms from your local law library or online. Remember to answer each question. 5.