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. We only deem a sponsor's resources to an alien if the sponsor completed the I-864 or I 864-A.Deeming resources is time limited for state funded benefits. Line-by-line guidance for properly filling out USCIS's I-864 Affidavit of Support to sponsor an immigrating family member. Completing and signing Form I-864 makes you the sponsor. The "Affidavit of Support" is a signed document to accept financial responsibility for a family member who is seeking a green card. An affidavit of support, (USCIS Form I-864), is required for all immediate relatives of US citizens and lawful permanent residents. Form I-864 is divided into nine parts. The information below will help you fill out the form. By signing Form I-864EZ, you are agreeing to use your income and resources to support the intending immigrant named in this affidavit, if it becomes necessary.