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. Form I134 is used to document the personal finances of a sponsor who lives in the United States.This form is required in most familybased green card applications, including CR1 and IR1 spouse visas and some employmentbased green card applications. 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. You do not need to notarize the form and it is useless in the B1 B2 context. Legal Consult Recommended. Each sponsor is required to complete a Financial Sponsor Affidavit of Support Form. Your friend simply needs to go online and complete the NON-immigrant visa application on the Consular Electronic Application Center website.