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.30 The joint sponsor must sign a separate Affidavit of Support, Form I-864. You, the sponsor (petitioner), and the joint sponsor must complete Form I-864. See tips for completing 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 are living with your spouse or your spouse has signed an affidavit of support, your spouse's income, resources, and property are also counted. 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. 1.e. I am the first second of two joint sponsors. Other Information. 1.f.