Thought this tidbit of news might interest you. A casino in Indiana supported by Intelleflex relies on RFID to track slot machine keys.
Although they have a secure system, employees sometimes put the key in their pocket, accidentally, of course.
RFID readers at employee exits ensure keys don't leave the building by mistake. "The casino actually has enough accidents where they get into trouble with the gaming commission, so they try and keep closer tabs on the keys," says Sam Liu, Intelleflex's director of marketing.