Everything you need to write a declaration letter to the judge in your custody case: an example, a downloadable template, an outline and tips. If there is a Children's Lawyer or Child Advocates office, ask them to investigate.Ask them to present an opinion on which parent is best. A complete list of forms can be found at the bottom of this page. Please read the instructions below to ensure that you select the correct form. State exactly what you want from the court here. Don't make demands though. Petition for (Custody) (Visitation). These are the official forms for use in Family Court proceedings. Customer: In a child custody case in Travis county Texas, I want step-by-step instructions on what to do after I have filed my motion with the district clerk.