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. The purpose of the Affidavit is to assist consular officers in determining whether a visa applicant will have adequate means of financial support in the US.If you are coming to the United States on a temporary visa, you may need to prove financial support. A sponsor can file the I-134 form. 864 Affidavit of support How to fill out the Form 864 immigration Tips US mmigration with Attorney Jacob Sapochnick We prefer that you complete the form(s) online. After the form is completed on the computer, it must be printed and mailed as instructed. Federal law requires that states offer and provide child support services (IV-D services) to all families, not just those who receive public assistance. We offer parking throughout downtown Grand Rapids. Take a look at our Interactive Visitor Parking Map to review locations.