Providing proof of domicile in the United States is critical for most people when submitting Form I864, Affidavit of Support. 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).Some types of evidence you can share to show you intend to establish domicile include: Opening a bank account. Transferring money to a United States account. Get in touch with your tehsil karmchari (Circle Clerk) with land document proof. There are five stages for application submission. 1. 1. Open the e-District portal and log in. This guide will clarify what domicile is, how to establish it, and the documentation you need for proof of domicile. In this post, we'll explore examples of proof of US domicile and the documents required to establish proof of domicile.