Everything you need to write a declaration letter to the judge in your custody case: an example, a downloadable template, an outline and tips. It defines the amount of time each party will spend with the child (physical custody) and how major.This article provides a comprehensive guide to writing a declaration letter for child custody cases, including a sample letter. Some court filing costs may be in the hundreds of dollars. 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. No, a letter to the Judge is an ex parte communication. The Judges will not read it. 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. There is no filing fee for this petition. 7.