My husband called me to tell me he is being sued by the IRS and it is the final notice. Told him to get me the number and tell me what they said in the message. He did, I found this post and thought why not call it back. I did from a land line, blocking my number and the number states it is no longer in service. There are many people who have had actual issues in the past who would fall for this scam. Rule of thumb, always do a search on who's calling you if you are in question the least little bit.