What Form I-864 is and what signing it means
uscis.gov says most family-based immigrants and some employment-based immigrants use this form to show they have adequate means of financial support and are not likely to rely on the U.S. government for financial support. USCIS also says Form I-864 is a legally binding contract with the U.S. government to financially support the sponsored immigrant, and that sponsors should not take on this obligation if they are not prepared to follow through. RepeatForm cannot tell you whether you should sign one or what it commits you to. Read the USCIS page and the instructions, and ask a qualified adviser if you have questions.