There are several types of Affidavit of Support forms (I-864, I-864EZ, I-864W, and I-864A). 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 purpose of the Affidavit is to assist consular officers in determining whether a visa applicant will have adequate means of financial support in the US. For undergraduate students, use this affidavit of support form. Warren Law Firm is your leading immigration attorney in Oakland, California and the surrounding areas. Request a consultation today! This is a sample letter for F-1 and J-1 supporters, showing that they are providing monetary support to students. The person who is petitioning on behalf of the immigrant visitor fills out Form I-134. The Affidavit of Support is a Contract between Sponsor and Household Member. The official website of the City of Oakland.