"BMW's Marriott corporate code does not have specific community-documented denial cases. FlyerTalk's general corporate code thread warns: "Every hotel has the right to ask for identification that associates with the corporate code — but very few actually do." BMW is a premium brand with a recognizable code, moderately identifiable to hotel staff. European properties — especially in Germany — carry a higher verification risk."

"I have stayed 100s of times with various corporate rates (including Japan) and the only hotel that has asked is W hotels. Even then they didn’t push much. I have been a consultant for 20 years and many clients require you to use their rates when they are paying the bill. The hotel doesn’t have an up to date list of every employee that works for a company globally. The woman at the W said “I don’t really care, just show me anything on your phone that says your name and that company. You can type an email now “."

"I now always make it a matter of course to carry documents (business cards of my contacts, e-mails requesting my visit etc.) from my host company when I travel. This has always proven sufficient for the few times I've been challenged by the front desk clerk."