"PwC's corporate code is strongest in major financial hubs (NYC, London, Hong Kong) and carries a high verification risk. Users reported being asked for work ID, business card, or corporate email verification at check-in."

"I have seen many of my corporate rates with 6:00 same day cancellation. If someone were ineligible for that rate and asked for ID at checkin, I guess they could say I have some business cards in the car and then go and cancel the reservation before the agent changes the details."

"Corporate codes can sometimes be used for personal travel, it depends on whether: (1) your company has a negotiated rate with the specific hotel and the contract allows for personal use (2) your company has a flat percentage discount with Marriott, which typically is not subject to contractual restrictions regarding personal use. Given the rate includes breakfast, it seems like it would fall as a rate plan negotiated with the specific property. I’ve used corporate codes many times for personal travel, and am usually asked for ID for negotiated rates (particularly in Japan). With regards to your second question, when you book a flexible rate your card guarantees the reservation but no amount is taken as deposit until you arrive at the hotel (or no-show) unless the terms specifically say a deposit is to be taken."