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. Form I-864 is required for most family-based immigrants and some employment-based immigrants to show that they have adequate means of financial support.The purpose of the Affidavit is to assist consular officers in determining whether a visa applicant will have adequate means of financial support in the US. Learn how to complete form I864EZ, the simplified affidavit of support form for immigration. Form I864, Affidavit of Support, needs to be filed DHS if you are a U.S. citizen or LPR planning to sponsor a spouse or family member. An affidavit of support, (USCIS Form I-864), is required for all immediate relatives of US citizens and lawful permanent residents. The I-864 Form assures that the petitioning family member is willing to support the person wanting lawful resident status financially. Download form I-864 from the USCIS website, fill it out precisely and send it in with the necessary financial documentation to get an affidavit of support. Welcome to our comprehensive video guide on Form I-864, the Affidavit of Support! An Affidavit of Support is US Immigration Form I-864.