Ooh, super scam. This one actually left me a voice mail. "Hello. This call is officially a final notice from IRS, Internal Revenue Service. The reason of this call is to inform you that IRS is filing lawsuits against you. To get more information about this case file, please call immediately on our department number, 701-897-2531. I repeat, 706-897-2531. Thank you."

Damn, that is some bold stuff right there.