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).Complete Form DS260 and upload civil documents. On Form I864, petitioners must prove that they have the ability to financially support the visa applicant(s) if necessary. In those cases, the NVC will ask for proof of the applicant's new residency, including their current address. 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. Upload the most recent version of Form I864 on USCIS website. The NVC will return the I864 if the reported income on the tax return is different from what is indicated in line 13a.