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.The affidavit must state the account holder's relationship to the student and the amount the account holder is willing to sponsor their studies. In this guide, we will explain who needs to complete Form I864, when to file it, and how to fill out Form I864 stepbystep. Declaration and Certification of Finance Guide – Please complete all information requested on the form in your myFIU account. Some sponsors temporarily reside abroad and intend to move to the US once a family member's immigrant visa is issued. All international applicants requiring the 1-20 Certificate of Eligibility Form must complete this financial affidavit. We do this via the Affidavit of Financial Support form. Please review page 2 of this form prior to completion. The applicant or sponsor must complete the Financial Affidavit form.