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 have a joint sponsor, they must also complete Form I864.You, the sponsor (petitioner), and the joint sponsor must complete Form I-864. See tips for completing Form I-864. 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. It is not binding upon execution and submission. The I-864 is required in order to show that the sponsor – or joint sponsor – has adequate financial ability to support the immigrant beneficiary. If you are filing Form I864 as the petitioning sponsor, use our How to Fill Out Affidavit of Support Form I864 guide. They must also complete a Form I864A, Contract between Sponsor and Household Member.