"General Motors' Hyatt code NC12964 is for one of the world's largest automakers. GM HQ is in Detroit MI — Hyatt Regency Detroit handles GM employees regularly. FlyerTalk's Hyatt verification pattern: 50% ID check rate across international stays, primarily at Park Hyatt and Grand Hyatt properties. Michigan/Detroit Hyatt properties are familiar with GM employee badges and may request them. US domestic Hyatt Place/House: minimal enforcement. No NC12964-specific denial documented."

"I was asking who was eligible to use OUR corporate discount when the GM volunteered this information. Management is way more visible at the (rather small) PHT than at larger Hyatts. I know I'm highly likely to run into the GM or his chief assistant during every stay, especially since I'm usually there for at least a week. Hence, I often hang on to my non-urgent questions until I see them. Might as well hear it from the source!"

"I actually used to work for the Park Hyatt Sydney several years ago, in sales and marketing. Every year corporate rates are negotiated based on the number of room nights from the previous year. I can assure you that the abuse of these codes will not go unnoticed. While a chainwide code may apply, it wouldn't be difficult for IBM to see that rates were being used at a property they may not utilise, such as the Park Hyatt Sydney due to the high average room rate, and realise that the code was being abused. They will also notice a significant spike in room nights booked."