Arizona Driver's License displaying a current address; 2. 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).Arizona law requires that you submit proof that your presence in the United States is authorized under federal law. Those who don't have the required residency documents must complete an Arizona Residency Affidavit and supply additional proof of residency. Resources. Download a proof of residency letter template for family members, notarized or non-notarized, tailored for legal use. Here's a residency affidavit you can fill out that counts as one proof of residency towards getting your license.