It's a con man saying he's from the US treasury. If u wait long enough you will hear a recorded message from a guy with a foreign accent saying if you must call, long story short it's a con. They say u owe money to IRS and will try and get you to pay. They threaten you saying the police will be there to arrest you in 45 minutes and you will be taken before a judge. It's nothing to worry about.
HUGE SCAM! Beware. Left message without knowing who he was calling. Heavy accent and said urgent matter to contact him. Said he was David with an enforcement action secured by United States Treasury for federal criminal offense to go in front of magistrate. He said let us help you. If the US govt has to contact you, I'm sure they will. If it's so urgent they will in person or with a certified letter. So bogus!