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. I am sponsoring the following family members immigrating at the same time or within six months of the principal immigrant named in Part 3.There are several types of Affidavit of Support forms (I-864, I-864EZ, I-864W, and I-864A). An Affidavit of Support is US Immigration Form I-864. Attorney David M. Nguyen discusses how to complete USCIS Form I-864, Affidavit of Support. Each application is independent, therefore the Applicants are required to bring a complete set of documents (ex. A family of 4 people = 4 sets of documents). Line-by-line guidance for properly filling out USCIS's I-864 Affidavit of Support to sponsor an immigrating family member. Each applicant must complete and sign a visa application, filling in each of its sections. The visa petitioner is required to sign the Form I-864.