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 required financial documentation is needed to issue your I-20 student visa eligibility certificate.Certified financial statements and Affidavit of Support. The "Affidavit of Support" is a signed document to accept financial responsibility for a family member who is seeking a green card. All individuals seeking a UDC Form I-20 to apply and obtain F-1 student status must complete an Affidavit of Financial Support for. Completing and signing Form I-864 makes you the sponsor. Form I-134 is a promise to financially support a person applying for a temporary visa to the United States, namely a travel visa or a K-1 fiancé visa. If the student lives in the US, the affidavit of support package can be included with the visa application. Submit a completed Affidavit of Support form. Sponsors who are US citizens and permanent residents should complete the USCIS Form I-134 Affidavit of Support.