This article tells you how to file an answer in a family law case (such as a divorce, custody, paternity, or modification case). This guide includes forms and instructions for a letter and affidavit to request that the court register an out-of-state custody order in Texas.When filling out your answer form: Print neatly in blue or black ink. Find the cause number and court number on the Original Petition in Suit. This guide tells you about responding to a custody case when it's part of a "Suit Affecting the ParentChild Relationship" (SAPCR for short). File this form when you and the other party cannot agree to a temporary arrangement for parenting, child support, or other issues before the final hearing date. You should respond with an answer and counterclaim for child custody. Responding allows you to clarify anything and tell the court what you want. File (turn in) your completed answer form with the court. If you and your co-parent cannot reach an agreement on child custody without any help, you need to file a petition for child custody.