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. The I864 Affidavit of Support is a signed document that a sponsor signs in order to accept full financial responsibility for the sponsored immigrant.Form I-134 Affidavit of Support is an important supporting document for your non-US immigrant visa request. A) Complete an Affidavit of Support form and; b) Gather evidence of their finances and other supporting documents (See Step 5). Learn about the requirements and documents for a K-1 Fiancé Visa. Call a K1 visa lawyer with Ybarra Maldonado Law Group at . CitizenPath provides an affordable service to help you quickly and accurately prepare Form I134, Declaration of Financial Support, for your situation. You will need to submit an affidavit of support to show that you can financially support your fiancé. They don't mention to bring an affidavit of support. USCIS or NVC did not request this form.