☐ Copy of document that identifies current residence in Cuyahoga County for last 60 days. • Domicile certificate (if applicable).Providing proof of domicile in the United States is critical for most people when submitting Form I864, Affidavit of Support. ☐ Copy of document that identifies adult Applicant's residence in Cuyahoga County for last 60 days. 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). 1. Open the e-District portal and log in. Current lease, mortgage statement or notarized domicile form.