U.S. Breaks Up Fake I.R.S. Phone Scam Operation
 

The Justice Department said sentences of up to 20 years in prison should discourage future fraud. Callers posed as tax or immigration officials.

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I think that when you did all the immigration and visa processes by yourself, you will not even think about something illegal there. I spent almost 2 months trying to get all the required document for the Form l-192. In the end, I found USImmigration service, they can help and make all the stuff faster.. something really crazy.