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. An Affidavit of Support is U.S. Immigration Form I-864.Do you mean how long it takes to fill out, sign and notarize it? • Affidavit of Support (Form I-864) for family-based applicants and supporting documentation (not required for DV lottery winners). 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. Go to the Electronic Diversity Visa (E-DV) website and click "Begin Entry. Familial sponsors can expect to submit an Affidavit of Support for applicants. The "Affidavit of Support" is a signed document to accept financial responsibility for a family member who is seeking a green card. New data reveal how companies that farm out IT workers exploit flaws in the visa lottery while other US businesses and talented immigrants lose out. (Affidavit of Support, Form I-864).