"Siemens (16605) appears in the FlyerTalk Hyatt discount code master list alongside GE, IBM, and Samsung. One contributor wrote: "GE generally works best, followed by IBM, but sometimes the Siemens and Samsung rates will amaze you — 70% off at the Grand Hyatt HK with Samsung." A user claiming ~40 uses across 10 countries with similar tech-company codes: "asked for ID about 50% of the time" — primarily at Park Hyatt and Grand Hyatt properties in Asia. Hyatt Place and Hyatt House in the US: essentially never checked. Park Hyatt properties in global capitals: near-certain check."

"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."

"I use MY job's corporate code when booking personal travel. Most companies have a list of which hotels they contract with also allow personal bookings. If you're improperly using a corporate code, the hotel can cancel your booking or change your rate at check in."