"FlyerTalk documents Samsung codes as remarkable — one user reported 70% off at the Grand Hyatt Hong Kong. HotelCorporateCodes.com rates Samsung as "Sometimes" for ID verification at Hyatt. Hyatt's general pattern: Park Hyatt checks most frequently, Grand Hyatt and Regency occasionally, Hyatt Place/House rarely. Hyatt is described as "notorious for checking for ID," especially internationally. One user documented 50% ID check rate across Hyatt stays in 10 countries, mitigated by self-printed business cards which "worked 100% of the time.""

"I guess I just don't see this. I'm not saying rates never changes, but if it really changed every time someone booked a corporate rate, then the rates would change constantly. I can't say that I see this too often or ever. Also I doubt there's enough people doing this to have a huge effect on overall occupancy anyway."

"We may have an issue of semantics regarding the travelzoo code. Often when Travelzoo has a special rate for a Hyatt Hotel that rate is also shown in the "Special Offers" section for the particular hotel on the Hyatt Website. The code for the comparable "Special Offer" is 13147 which is often referred to as the Travelzoo code. As this code is available on the website, it gets both stay credit and points. At least, this is my impression."