A recording claiming to be the IRS and they were filing a lawsuit against me. Recording gives a phone number for you to call back. I had been warned about this scam so I paid no attention to it but they have called a few times.
I knew this was a scam so I had a little fun. I started calling the number back as many times a day as it has been calling me and harassing the people that pick up. It's fun placing food orders and telling them fake stories about my day. The number has since been disconnected. I miss my friends from the "IRS"