Left this recorded message:   "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 lawsuit against you.  To get more information about this case file please call immediately on our dept number 701-897-2533 I repeat 701-897-2533.  Thank You"

I received the same call and voicemail message as Lassie.  If this were legitimate, wouldn't they provide more information; like name of the party they are trying to reach and a case number?  Must be a new scam... will check back to see if others provide more information.  Caller ID just says "Wireless Caller."

Here Ya Go, folks:
http://www.cnbc.com/2015/10/28/guess-what-thats-not-the-irs-calling.html

May 20st 2016 Caller ID said North Dakota call. Robot call said that it was my final warning from the IRS to call them back at 701-897-2533 threatening a lawsuit. SCAM !!! I know better but want to warn others. I seen on another site a few other people reported the same exact thing from the same exact number

Why are these creeps getting away with scaring some people with this crap?  (Not everyone knows this website is available to check unknown call numbers).