Fill out the following form. You are the "Plaintiff.Be sure to keep a copy for your records. Steps for Filing a Complaint. To begin a non-dissolution custody action, you'll complete a Verified Complaint. This guide includes forms and instructions for a letter and affidavit to request that the court register an outofstate custody order in Texas. This form is available on Westlaw. Easily search more than 600,000 legal forms to find the exact form you need. Required Court Forms When Filing an Initial Non-Divorce Application for Child Support. Photos and other evidence should be submitted attached to an affidavit or certification, and then only as part of a motion or other application to the Court.