Individuals immigrating through most family-based, and some employment-based,1 visa petitions are required to submit an Affidavit of Support on. Learn about the I-134 affidavit of support form, its requirements, and how to complete it.Ensure your visa application process is smooth with us. In this video we're going to show you how to complete an i 864 and affidavit of support that is needed as part of the package for an adjustment of status. The purpose of the Affidavit is to assist consular officers in determining whether a visa applicant will have adequate means of financial support in the US. If you are coming to the United States on a temporary visa, you may need to prove financial support. A sponsor can file the I-134 form. Has information you must know before you submit your application, and; explains how to fill out the forms and gather your supporting documents. The "Affidavit of Support" is a signed document to accept financial responsibility for a family member who is seeking a green card. The purpose of Affidavit of Support, Form I-134 is to affirm that a sponsor of a US Visa applicant can financially support the applicant while in the US.