@Guy *****
The embassy provided you an affidavit. Basically, they have a document that you sign stating ...
"Note: An affidavit is a self-sworn statement, NOT a guarantee or certification of single status. Ensure you are prepared to provide proof of divorce, death, etc., to an Amphur should they require it." th.usembassy.gov
This is the form you need to fill out. You simply fill-out the form (do not sign it). Take the form to the embassy and get it notarized (this is when you sign it).
You would have to fib but they're not likely to check if you are married in any other state. They don't do credit check or tax reports. I don't think you would get caught. However, it could cause you some legal problems if she get wins the lottery and dumps you. You could sue her but then she could raise the issue that you're marriage is phony.... But I doubt it will be a problem.
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