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. What legal identification is required?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. 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). You can inform NVC of the domicile address along with your employment offer proof. Below is a list of forms that you may download for free from our website. Before applying for a K-1 visa, it is necessary to file the I-129F Petition for Alien Fiancé(e) through the National Visa Center.