An affidavit of support, (USCIS Form I-864), is required for all immediate relatives of US citizens and lawful permanent residents. In this video we're going to show you how to complete an i 864 and affidavit of support that is needed as part of the package for an adjustment of status.Use this form to show they have adequate means of financial support and are not likely to rely on the US government for financial support. In order to obtain a green card your qualifying relative must file an immigrant petition on your behalf called an I-130 Petition for Alien Relative. Learn the what, why, and how of filing a form I-864 affidavit of support for US immigration. A photocopy of a birth certificate is a sufficient and acceptable form of proof. 4. Enter a mailing address for the partnership. Among one of the most common ways of obtaining lawful permanent residence is through a family-based petition (Form I-130). IMPORTANT — Read Instructions before completing this form. Once USCIS approves Form I-130, the prospective visa recipient must fill out Form DS-260, Online Immigrant Visa Application.