it's an employee leisure rate, so in theory, they can ask to see id to confirm that you are employed by the company, but since so many companies "share" this rate code, I can't see how they can verify employment... or care. Also, since retirees of the company I work for can also access this rate, showing ID is a bit impractical. Depending on your "ethics" of booking a discount that you aren't entitled to use, i'd say the chances of being asked for id is slim.