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). Providing proof of domicile in the United States is critical for most people when submitting Form I864, Affidavit of Support.Filing of this form is voluntary. Without the necessary information, the Michigan. Any item presented to establish proof of residency must include the applicant's name and a Michigan residence address (no P.O. boxes or Mailbox Plus addresses). Make at least five copies of the form after you have filled it out. 2. File the Motion form with the county clerk. The IRS provides this residency certification on Form 6166, a letter of U.S. residency certification. Examples of acceptable evidence. Description. Residence in the U.S.. Lease agreement; Mortgage payments; Utility bills.