A) Complete an Affidavit of Support form and; b) Gather evidence of their finances and other supporting documents (See Step 5). 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.Completing and signing Form I-864 makes you the sponsor. Learn about the I-134 affidavit of support form, its requirements, and how to complete it. Ensure your visa application process is smooth with us. 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. Some sponsors temporarily reside abroad and intend to move to the US once a family member's immigrant visa is issued. You do not need an affidavit of support in this situation. They should submit only the documents listed on their application. Note: Mistakes in completing the I-864 are a common reason for delays with an immigrant visa application.