I-134 / I-864 Affidavit of Support form. Ensure it is notarized (by a public notary), with all required supporting evidence. Some consulates may require one or the other forms. You will need to verify with the consulate which they require. You can call or email the consulate to check ahead of time. Additionally, the consulate will notify your fiance(e) via mail correspondence which they prefer. Attempt to start collecting the required information ahead of time, as it can often take several weeks to collect it all.
I-134
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I-864
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