CallerID showed "Out Of Area".  Area code tracks to Belair, Maryland, NE of Baltimore.  Called back (with my number blocked) and Indian-accented man answered "US Treasury, how can I help you?"

Hang up.  I was going to answer to toy with the fraudsters but alas no luck this time.

by the way, I suggest nobody RETURN these fake calls -- the NEED you to call them back to get your name off of caller ID.  That is why they hang up or otherwise use recordings to get you to call back.  If they call live and you answer and they say they are suing "you" and you ask, "Please tell me who you are suing so I can get them on the phone," they won't actually have a name because it's just a robocall.

And even if they have your name from some list, just tell them to go to #$#@.