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. The sponsor must complete and sign the Affidavit of Support and attach all required documentation, including copies of tax returns.The public charge ground of inadmissibility does apply to winners of the diversity visa lottery, but they need not have an I-864 filled out on their behalf. 1. Recent Federal Tax Return: Sponsors must submit their most recent federal tax return as evidence of their annual income. The "Affidavit of Support" is a signed document to accept financial responsibility for a family member who is seeking a green card. Is it possible to win a DV lottery, fill the forms, and not get invited for an interview? Please place everything in a single envelope with your case number and full name on the outside, and address it to "Immigrant Visa Unit.