"Marriott luxury properties near financial hubs like NYC and SF have dedicated rate integrity teams. The SF Marriott was specifically noted for cracking down on corporate code abuse. HotelCorporateCodes.com rates Goldman Sachs as "Sometimes" for ID checks. No documented full-rate charges found in public forums, but Asian properties are more likely to ask; US properties inconsistent. Business card typically accepted when asked."

"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."

"I swear the front desk employees are trained to resist and encouraged to lie. They try to save the rooms for members with higher status or complainers. I've booked King rooms and they'll assign me a double or a queen. The first rep will tell me they're fully booked and there's nothing they can do. But once transferred to a manager, King rooms magically appear!"