"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 tried this in Montreal once when the partner actually made the flights and reservations and everything for me. They put me on rack rate until one of the folks from the partner company arrived to check in and showed their ID."

"I’ve stayed at the HR Tokyo four times on leisure travel using the Deloitte corporate code. I believe they have asked for my badge each time, which I have shown to them and it has not been an issue. They have never asked if I was traveling for business, and I have had someone with me each time (either my partner or mom)."