Providing proof of domicile in the United States is critical for most people when submitting Form I864, Affidavit of Support. 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).Examples of acceptable evidence. Description. Residence in the U.S.. Lease agreement; Mortgage payments; Utility bills. Proof of U.S. domicile is required for the I864. Learn examples of proof of domicile along with proof of domicile documents required. Learn how to prove your U.S. domicile for a family visa with our stepbystep guide. Essential documents and tips to ensure visa approval. When service is made through the court, proof of service of notice shall be in the same manner as proof of service of summons. (F) Proof of service of notice; when service of notice complete.