"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."

"I use a code for most bookings and have never been asked for an ID. I have an ID but it does not have our company name on it since it’s also my badge to access the building and we have one office in our city. If it ever came down to it I can send them an email on the spot from my @company.com email"

"I really don't think you should be worried. I have never been asked for ID at any hotel including the PHT. In fact, all the front desk person knows is that you are using some type of corporate discount. You are right, you could have any of a number of connections to the company, vendor, contractor, applicant, spouse of employee or applicant, salesperson, client and the list goes on."