Calls regarding public tax liens-they constantly call. They get a listing of all public tax liens and cold call to try and help you "settle" with the IRS.

I received a call stating I owed money to the IRS regarding a business closed many years ago. The person claims even speaking with someone yesterday on my number. When caught on the lie starts changing his story and makes another lie as he keeps talking.  People do like I did - confront them and hang up the phone on them,