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.Line-by-line guidance for properly filling out USCIS's I-864 Affidavit of Support to sponsor an immigrating family member. An Affidavit of Support is US Immigration Form I-864. This article will provide information to assist you in filling out Form I134 to help foreign visitors applying for a tourist or other nonimmigrant visa. One for the original petitioner and one for the joint sponsor. US citizens may file Form I-129F, Petition for Alien Fiancé, to request a K-1 visa for a foreign fiancé or a K-3 for a foreign national spouse. Which one we have to fill out for K1 visa? This form is required in most familybased green card applications, including CR1 and IR1 spouse visas and some employmentbased green card applications. You must also submit an affidavit of support for your parent, referred to as the I-864 form.