Here is the script that is played, so if anyone has a call they know it's the same one, and not to worry:
"I am calling from the legal affairs at the U.S. Treasury Department. My badge number is 9165. The nature and the purpose of this call is regarding an enforcement action which has been executed by the U.S. Treasury Department regarding a tax fraud against your name. Ignoring this will be an intentional attempt to avoid initial appearance before a magistrate judge or a grand jury for a federal criminal offense. So, before this matter goes to the federal claims court house, or before you get arrested, kindly call us back on our number as soon as possible.
The number to reach us is 202-846-0368. Let me repeat the number again 202-846-0368. Hope to hear from you soon before the charges are pressed against you, thanks.".