Thanks for confirming my suspicions, everyone! I got the same vm on March 16 - just listened to it now for the first time and nearly had a heart attack. I have some medical debt and that will likely follow me around until the end of time, and am just paranoid enough to half-believe this kind of "threat"...
Claimed to be for the U.S Treasurey, threating that i would be arrested if i did not respond. When caller was questioned regarding the purpose of the call, caller stated that taxes from 2010 was not paid and i would be arrested. When asked where and when information was sent, caller stated that all the information was sent years ago. When asked from written documentation to be sent caller stated it had already been sent in 2011. caller then proceeded to hang up when constantly asked for their caller information location and mailing address.