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.If you are coming to the United States on a temporary visa, you may need to prove financial support. A sponsor can file the I-134 form. Enter anticipated income, not what the sponsor paid in taxes last year. 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. Affidavit of Support. Some sponsors temporarily reside abroad and intend to move to the US once a family member's immigrant visa is issued. It is important that the sponsor(s) carefully follow the instructions to determine which form needs to be completed, and how to complete the forms. Affidavit of Support.