In this article, we'll explain how to prove US domicile as part of your Affidavit of Support so you can successfully sponsor a family member for a green card. Providing proof of domicile in the United States is critical for most people when submitting Form I864, Affidavit of Support.How Can I Prove U.S. Domicile? Examples of acceptable evidence. Description. Residence in the U.S.. Lease agreement; Mortgage payments; Utility bills. In this post, we'll explore examples of proof of US domicile and the documents required to establish proof of domicile. Have maintained your domicile in the United States. Examples of proof include: A. Your voting record in the United States;. Beginning with 2024 Certificates of Rent Paid, you must create and submit all Minnesota CRPs using eServices.