Completing and signing Form I-864 makes you the sponsor. In this guide, we will explain who needs to complete Form I864, when to file it, and how to fill out Form I864 stepbystep.In today's video I'm going to show you how to properly submit the Affidavit of Support and financial evidence for conselor process. 864 Affidavit of support How to fill out the Form 864 immigration Tips. A joint sponsor files a separate form I-864 Affidavit of Support, alongside the primary sponsor when the latter's finances are insufficient. I make this affidavit for the purpose of assuring Wake Tech Community College that the person(s) named in the area above. Line-by-line guidance for properly filling out USCIS's I-864 Affidavit of Support to sponsor an immigrating family member. Yes, you can include provisions about child custody and child support in a separation agreement. I would like to receive the GMA WakeUp newsletter for news briefings, deals, and more. Words of Support Amid the Chaos.