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. This affidavit is to be used only if you are unable to provide primary proof of citizenship, such as a passport or birth certificate.Need help to fill out your Affidavit of Support? Call (202) 580-4559 Immigration attorney Vinogradsky routinely helps with I-864 Form. If you completed the WASFA during 2019 or later, then you have already completed the Residency Affidavit. Completing and signing Form I-864 makes you the sponsor. Use our Form Filler to fill out your form and print it. For the best experience, use a desktop or laptop computer. How To Fill Out Form I-134. 1. Type or print legibly in black ink. 2.