The petitioning sponsor must complete and submit a signed Form I-864 for the intending immigrant even if a joint sponsor will be used. In today's video we are going to be filling out form i 864 the affidavit of support form for the joint sponsor.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. This video will help you to fill out I-864 For Joint Sponsor. You, the sponsor (petitioner), and the joint sponsor must complete Form I-864. See tips for completing Form I-864. If you are filing Form I864 as the petitioning sponsor, use our How to Fill Out Affidavit of Support Form I864 guide. In this guide, we will explain who needs to complete Form I864, when to file it, and how to fill out Form I864 stepbystep. Residency Affidavit is for students who are presented and want to enroll and attend a CMS school now. Used when a family is residing with another family.