"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."

"1. The policy is that you need to be an employee at the time of the stay. 2. If you booked a U.S. hotel, especially if it's a budget brand or if you had stayed at that hotel before, most likely they won't ask for ID and you should be ok. 3. If you are adamant about not gaming the system for ethics reasons, then you should pay the higher rate. 4. If any hotel does ask for ID, a photo of a company badge generally will not suffice. Given they are going out of their way to ask you, they will want verifiable proof that you're an employee."

"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."