"Daimler Benz's Hyatt code (99800) is for the Mercedes-Benz parent company. Daimler has major presence in Stuttgart, Germany and significant US operations in Alabama (Mercedes-Benz US Manufacturing). Hyatt's European enforcement pattern applies: Park Hyatt Frankfurt/Munich/Stuttgart carry higher verification risk. FlyerTalk's Hyatt thread: "In Europe and some parts of Asia, proof has been requested 100% of the time." US domestic Hyatt Place: essentially never checked. Daimler later restructured as Mercedes-Benz Group AG."

"I was referring specifically to a corporate ID. I know international properties ask for passport. What I mean is that I have always been asked for both my corporate ID and personal ID every time I've used a corporate code at an int'l property."

"We are pleased to note you have a future reservation on xxxxxx, 2010 made through hyatt.com. I do kindly ask that you bring your valid working ID in order for us to be able to confirm the corporate rate at time of check-in which will be cross referenced with the company. Unfortunately of late we have been experiencing misuse of some of our corporate rates, with your company a target and we have had to implement tighter controls in this regard."