They left a cut off message (i.e. the first part was missing).  Only got a portion that said to call the number.  Obviously a SCAM!

caller said revenue canada......criminal case concerning unpaid or fraudulent taxes......I know we are up to date so I did not call back..........it was a recorded message.

I received a call today and it claimed the same thing owe back taxes and fraud!!!  I have been paying my taxes!!  I thing people should be aware of this phone number,  seems to be some sort of scam

Just got a message saying they were coming after me with criminal charges for fraudulent taxes..lol
I can see how some people would be terrified and pay what ever. If this number calls you please don't talk to them they are frauds. Revenue Canada would not leave a voice mail and would never ask for you phone number. They would ask for you by name if they call at all.
Beware of this number 305-224-1007

I've received several calls from this number including 2 today claiming I am being charged with tax fraud. Obviously a scam.