"HotelCorporateCodes.com rates Marriott WEL as "Sometimes" for ID verification. Marriott tends to verify more than Hilton or IHG. The SF Marriott properties — near Wells Fargo HQ — were specifically mentioned as properties that cracked down on corporate code abuse. No WEL-specific denial documented in public forums. Business cards have been reported as universally accepted when verification is requested."

"I have been asked to show some proof couple of times. I normally show my corp id but credit card with employers name on it has worked, too. As would probably just showing my laptop with employer e-mail account or whatever. My impression has been they are happy with just about anything that proves I'm working for the company whose rate I use and why wouldn't they."

"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."