TOTAL SCAM!  I got called on 03 June 2016.  They pretended to be IRS, threatened me with warrants and arrest, claimed they had sent letters that I hadn't responded to, etc.  When I told them I didn't have any credit cards, had filed bankruptcy, and had only $400 in the bank (all of it a lie), they suddenly got very anxious to end the call.  Hahahaha!  They obviously felt I wasn't worth their time and wanted to move on the their next victim.  What scumbags these people are!  I reported the number to the IRS and the Dept of the Treasury fraud departments.