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).On Form I864, petitioners must prove that they have the ability to financially support the visa applicant(s) if necessary. You have to submit at NVC, NVC's job is to collect the documents for the consulate and make sure they are complete. This guide will clarify what domicile is, how to establish it, and the documentation you need for proof of domicile. Please submit proof of domicile. You should submit evidence to the National Visa Center along with Form I-864.