Tax filing specialists are warning Americans about so-called “ghost tax preparers” who set up shop during tax season, accept money for handling tax documents, and then disappear after April 15. We’re working on a story for The Street on key signs you might be hiring a tax “expert” who’s more adept at disappearing acts. How does one know they’re being defrauded by a phony tax preparer? What are the warning signs? How can tax consumers prevent this from happening? Requirements: Tax experts, tax preparers, accountants, fraud experts, taxpayers who’ve been defrauded by fake tax preparers.