"FlyerTalk directly documents Grand Hyatt Tokyo staff awareness: "Memo from WoH Concierge to GH Tokyo: Beware of guests using CS code without proper ID" — implying the property is actively watching for unauthorized Credit Suisse code use. A Hyatt Regency Tsim Sha Tsui guest received a pre-arrival email requesting verification, resolved only by replying from a CS corporate email. Financial-sector codes are the highest-risk Hyatt category. Credit Suisse (now UBS following 2023 acquisition) triggers additional suspicion because the acquiring company may no longer honor old CS codes."

"My badge doesn’t have my company name on it... what else would they ask to verify? (Booked a stay in Japan on corp rate)"

"this is not really true. i am able to use my corporate rate even when not traveling on official business. so therefore, whether IBM is not using the park hyatt sydney for employees on official business, employees on vacation can still utilize the code as long as they have the appropriate ID. and my girlfriend has been able to use my corporate ID and has been asked for ID and has provided my business card and there has never been a problem. the children of the owner of our business frequently use their dad's corporate code for their own travel, and again, there has never been difficulty with using it when asked for ID."