How Can I Prove U.S. Domicile? In this post, we'll explore examples of proof of US domicile and the documents required to establish proof of domicile.A. Purpose of the RDS Guidebook. Under the authority of the North Carolina State Education Assistance Authority (SEAA), the. 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). How Do I Fill Out an Affidavit of Domicile? The NC Division of Motor Vehicles recognizes the documents below as proof of North Carolina residency. Line-by-line guidance for properly filling out USCIS's I-864 Affidavit of Support to sponsor an immigrating family member. Examples of proof that a sponsor's trip abroad is temporary and that he or she has maintained a domicile in the United States may include: