This document summarizes the requirements for I-134 and I-864 Affidavits of Support. The I-134 is generally not legally binding but is required for some visa applications to show the applicant will not be a public charge. The I-864 is legally binding and required for most family-based immigration cases to prove the sponsored immigrant will not need public benefits. It details the income requirements sponsors must meet based on household size and allows alternatives like assets or joint sponsors if income is insufficient. The obligations and potential enforcement consequences of the I-864 by government agencies or the immigrant are also outlined.