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 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.An Affidavit of Support is US Immigration Form I-864. This article will provide information to assist you in filling out Form I134 to help foreign visitors applying for a tourist or other nonimmigrant visa. The co-sponsor must submit their own Affidavit of Support (Form I-864) and must meet the above income requirements all on their own. The "Affidavit of Support" is a signed document to accept financial responsibility for a family member who is seeking a green card. Attorney David M. Nguyen discusses how to complete USCIS Form I-864, Affidavit of Support. All questions on the DS-260 form must be answered in detail, including complete employment and education histories, and U.S. sponsor contact information. Military. Military Affidavit. This form is used as proof to the court that a custodial or noncustodial parent is in the military.