I got a call from "federal agents" (no particular agency, just federal agents) telling me that I'm about to be arrested for tax fraud and several other crimes. I've been retired for years. I like to mess with these idiots when they call... the last guy was hilarious. I asked him: "you know who I am right?" He said of course. I said: "Then you know that I'm an investigator for the Arkansas Attorney General's Office then" He hung up!
I thought it was only in my country :) Surprisingly, such a big world, and the fraud schemes are the same. They have absolutely no imagination :)