When applying in person, please carry original and one photocopy of specified supporting documents along with filled up Miscellaneous Application Form. This is an Official Government Record.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. 1. Open the e-District portal and log in. We recommend completing Affidavit of Support forms on a computer or typewriter, with answers typed in CAPITAL letters.