they would be forced to bring me before a magistrate  or something.  No name or identification left at all which I would expect if this were real.

same call

I have received this call 5 times this week on my answering machine.  3 of the calls were from completely different numbers but with the exact same recorded message as above.  "Dennis" called at 8:30 am today.  A-holes with nothing better to do than try to scare people.  Note: the IRS - US Treasury will NOT call you.  I hope this guy gets audited and screwed.

The very threatening message that has been left for me multiple times reads as follows-
"This message is intended to contact you regarding an enforcement action executed by the United States Treasury intending your serious attention.  Ignoring this will be in an intentional attempt to avoid an admission appearance before a Magistrate Judge or a grand jury for a federal criminal offense.  My number is......I advise you to call and help us help you."  There were 3 phone numbers associated with this message- 1-407-588-1689 / 1-706-250-8338 / 1-314-627-0386 represented by David Grey / Dennis Grey and Robert Morris.  THIS IS A FRAUD AND A HARASSMENT!!!   - same message left for "Annoyed" in their comments.

This is clearly a scam. If the IRS had an issue with you, they'd either send you a certified/registered letter or (in extreme cases) come to your door in person and show you their IDs.

I've received calls from this "Dennis Cray" (whose real first name is probably Sanjay, Vijay, Sandeep, Jitendra, or some other male first name that is common on the Indian sub-continent), and from another Bangalore Boy named "Steve Martin" (that Wild and Crazy Guy) from phone number (228) 357-9084.

What sucks about this is the possibility that some of these Bangalore Boys may have at one point worked for a legitimate call center for a company with whom you have done business. If they harvested a bunch of personal information before they quit (or got fired), I could see where they could use that information as leverage against an unsuspecting citizen with a legitimate tax issue.

The real U.S. Treasury has a page set up that allows you to report these scams:

https://www.treasury.gov/tigta/contact_report_scam.shtml