Caller ID identified this caller only as "New York". I didn't answer. An automated message was left stating "This is IRS" (not "This is the IRS" - bad English). It told me they were filing a law suit against me, and to call them immediately at 202-738-1919. It was also weird because of the way they said the number to call. They said "202738.1919" (202738 point 1919), like they were unfamiliar with American phone numbers.
Called my wife, said something about being from Windows and was getting error messages. She pretended he was a stalker and hung up. Amazingly, he called back using an Unknown ID 3010 the second time. His accent was really thick, so hard to hear everything he said. I'm reporting to the National Do Not Call Registry.