Instructions to Applicants to the M.D. program: This is a fillable PDF form. Please answer the following questions within the space.How Do I Fill Out an Affidavit of Domicile? 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). Your address on file with GCA must always be confirmed with a Proof of Residence in the name of the Legal Guardian. There are five stages for application submission. 1.