Introduction to representing yourself in Pennsylvania. Each of the documents listed below inculde a blank form and the instructions to fill out that form.Everything you need to write a declaration letter to the judge in your custody case: an example, a downloadable template, an outline and tips. 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. This article provides a comprehensive guide to writing a declaration letter for child custody cases, including a sample letter. Box 1: Print in the county in which you are filing your petition. This will be the county court which issued the custody order. A stipulation is another word for "agreement.