If you have a joint sponsor, they must also complete Form I864. 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.You, the sponsor (petitioner), and the joint sponsor must complete Form I-864. See tips for completing Form I-864. 30 The joint sponsor must sign a separate Affidavit of Support, Form I-864. This form is required in most familybased green card applications, including CR1 and IR1 spouse visas and some employmentbased green card applications. If you have a joint sponsor, the joint sponsor must also complete and sign USCIS Form I-864. In this video we're going to show you how to complete an i 864 and affidavit of support that is needed as part of the package for an adjustment of status. CitizenPath's software and Affidavit of Support sample can help you easily prepare a Form I864, Affidavit of Support, for your relative. Maintain the sponsored immigrant at an annual income that is not less than 125 percent of the Federal Poverty Guidelines (FPG);