"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."

"Stayed there June 2025 and they asked to see my badge. They didn’t really look at it to be honest- I work at a tech company where no company name is on it. I’m a globalist and find they just want to see badge as an ask vs actually verifying ID badge. Seems it is different for each person based on comments. I’ve never been asked to send an email from corp account. 🤯"

"International locations will require a passport as identification when you check-in to confirm idenity and for other govt and immigration reasons. It is not b/c you used a corporate id code. Also, every international hotel I have stayed in at Hyatt has asked for a business card. This is so they can update there records for futrue stays and it is easier for them to read the business card. They are not looking for you to show them an employee id badge. I have used and continue to use various corporate codes to get the best discount, I generally give them my business card so their records are clear, but have never had an issue."