Complete Affidavit of Support Form​​ You, the sponsor (petitioner), must complete Form I-864EZ. See tips for completing I-864EZ.This tip sheet will help you complete Form I864, Affidavit of Support Under Section 864A of the INA. Detailed. 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. An Affidavit of Support is U.S. Immigration Form I-864. It's on the visa applicant to proof strong ties to their home country and that they'll return after their visit. Line-by-line guidance for properly filling out USCIS's I-864 Affidavit of Support to sponsor an immigrating family member. Attorney David M. Nguyen discusses how to complete USCIS Form I-864, Affidavit of Support. OPTIONAL: if you will be providing any support for your family, download the I-134, or Affidavit of Support. The person who is petitioning on behalf of the immigrant visitor fills out Form I-134.