Completing and signing Form I-864 makes you the sponsor. Use this form to show they have adequate means of financial support and are not likely to rely on the US government for financial support.This research guide includes information and resources on some of the most common affidavits and declarations related to family law. Both affidavits and. This guide includes forms and instructions for a letter and affidavit to request that the court register an outofstate custody order in Texas. All child support forms are categorized and linked below as downloadable files. Select the category you need to see the corresponding forms. This Divorce Set Contains instructions and seven forms: an Affidavit of Indigency, an Original Petition for Divorce, a. 864 Affidavit of support How to fill out the Form 864 immigration Tips. In general, Texas has very few official legal forms.