Petitioner: The petitioner must complete an Affidavit of Support Form I-864. The person who signs the Affidavit of Support is also called the "sponsor.Our online service provides step-by-step I-864 instructions so that you can fill out the form in the same day. Get legal help with, Form I-864W, Waiver of Affidavit of Support. Such as: Proof of Sponsor's Funds. 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. Applicant: This is to certify that the information given on this form is complete and accurate to the best of my knowledge. An Affidavit of Support is US Immigration Form I-864. And wish to convert to an F1 student visa, please do NOT submit the form at the time of admission. The affidavit of support ensures that the intending immigrant will not become a financial burden to the U.S. government.