This is an Official Government Record. This form is used to precisely document your citizenship, domicile, and tax status.If you want to sponsor someone for a family-based green card, you need to provide proof of a U.S. domicile in your Affidavit of Support (Form I-864). This guide will explain how to prove domicile when filling out Form I-864 ("Affidavit of Support"). Consular processing support without the high price tag. You must fill out a Medicare Asset Form and show proof of your current resources and liabilities (all pages of bank statements, credit card bills, loans, etc.).