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. After you complete your DS-260(s), you and each family member immigrating with you MUST collect the civil documents required to support your visa application.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. Please submit proof of domicile. Use this form to show they have adequate means of financial support and are not likely to rely on the US government for financial support. You are required to obtain the original or certified copy, and one photocopy (with the exception of your passport and photographs) of the following documents. On Form I864, petitioners must prove that they have the ability to financially support the visa applicant(s) if necessary. 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). Gov or submit in-person at the NYC Comptroller's Office.