Completing and signing Form I-864 makes you the sponsor. Form I134 is used to document the personal finances of a sponsor who lives in the United States.CitizenPath provides an affordable service to help you quickly and accurately prepare Form I134, Declaration of Financial Support, for your situation. Individuals immigrating through most family-based, and some employment-based,1 visa petitions are required to submit an Affidavit of Support on. In order to fill out an affidavit of support as a sponsor, you must be a U.S. citizen or green card holder. Schengen (Short stay) Visa Application Form (up to 90 days). A citizen of a foreign country who seeks to travel to the U.S. generally must first obtain a U.S. visa, which is placed in the traveler's passport. For more information about the sponsor's financial obligation, check out our guide to the Affidavit of Support (Form I-864). A Form I134 affidavit of support serves as a visa applicant's evidence of sponsorship, or evidence that the applicant has financial support. Primary Identification.