"HP's Marriott code HPQ is one of the most widely shared codes in FlyerTalk's publicly usable Marriott codes thread. Marriott's automated system has been documented to disable Mobile Key for high-risk codes being used for the first time, forcing front desk interaction. HP's deep discounts — noted as cheapest in China by one source — make it a higher-risk code. Hotels in HP-heavy markets (Palo Alto, Houston) are familiar with the verification process."

"My employer does not have a corporate rate but when I'm consulting for a company that does, I use theirs. I've only been challenged for identification once. In that one situation I explained the consulting arrangement, and the desk clerk accepted it without a badge or business card (neither of which I had anyway)."

"I have stayed 100s of times with various corporate rates (including Japan) and the only hotel that has asked is W hotels. Even then they didn’t push much. I have been a consultant for 20 years and many clients require you to use their rates when they are paying the bill. The hotel doesn’t have an up to date list of every employee that works for a company globally. The woman at the W said “I don’t really care, just show me anything on your phone that says your name and that company. You can type an email now “."