"HSBC's HSB code is listed across all major aggregators and rated "Sometimes" by hotelcorporatecodes.com. HSBC has a formal Marriott Bonvoy partnership (HSBC Premier cardholders receive complimentary Silver Elite status), making the brand relationship well-known to hotel staff — but this awareness cuts both ways. Finance-sector Medium calibration applies, with higher risk at NYC Midtown and London properties where HSBC has dense employee concentration."

"I am very rarely asked to prove my eligibility for a rate...but they have every right to ask and if you can't produce it, you will be re-rated to the current rate, which is often even higher and there is no guarantee points rooms will be available. Doing online check in rarely helps this as most properties don't actually do online anyway - especially to people who are not returning guests to the property or elite. You are taking a gamble. One that is likely to be fine. But understand you are intentionally breaking the terms of the bonvoy program and if someone really cared, there can be consequences."

"I now always make it a matter of course to carry documents (business cards of my contacts, e-mails requesting my visit etc.) from my host company when I travel. This has always proven sufficient for the few times I've been challenged by the front desk clerk."