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.Petitioners who are sponsoring immediate relatives for their green cards need to complete an "Affidavit of Support" as part of the application process. A fully completed and signed Affidavit of Support (Form I864) from the sponsor. An Affidavit of Support is required. In order to act as a sponsor, an individual must file a Form I-864, Affidavit of Support. Situations Where Sponsor is not Required. (A student with a sponsor in the U.S. may also need their sponsor to complete I-134 Affidavit of Support in order to apply for their student visa. (A student with a sponsor in the U.S. may also need their sponsor to complete I-134 Affidavit of Support in order to apply for their student visa. This form (Petition for Alien Fiancé) provides supporting information that the relationship is valid.