This is a nasty fake call claiming to be the IRS filing a lawsuit against you. They leave an automated message and when you callback they ask for your information. I told him to prove it was not a scam and he could not and then he said that the cops would be at my door to arrest me in 45 minutes.
Computer-generated message: The purpose of this message is to notify you that the IRS is filing a lawsuit against you. For more information call 573 479 9158. On a previous occasion, the police told me that if you ever get a recorded telephone message from the IRS, it is a scam.