If not submitted to NVC along with the Affidavit of Support form, the petitioner will need to provide the visa applicant with evidence of his or her domicile. 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. This guide will clarify what domicile is, how to establish it, and the documentation you need for proof of domicile. Providing proof of domicile in the United States is critical for most people when submitting Form I864, Affidavit of Support. Typically, in order to claim US domicile, the Affidavit of Support sponsor must be residing in the United States. Must have owner's name and current address in Minnesota. A P.O. Box will not suffice as proof of current residency in Minnesota. Search all USCIS forms.