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. 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). This guide will clarify what domicile is, how to establish it, and the documentation you need for proof of domicile. In today's video I'm going to show you how to properly submit the Affidavit of Support and financial evidence for conselor process. 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. Acceptable evidence to support their domicile claim. Completed Form I-864.