"Southwest Airlines's Marriott code SW8 is an airline employee code. Airline employee IDs are physical company-issued badges — well-recognized by hotel staff at airport corridor Marriott properties. Properties near Southwest's Dallas Love Field HQ, Phoenix, Baltimore, Denver, and Las Vegas hubs are most likely to verify. FlyerTalk's general airline employee code thread: "Airline codes are more likely to be checked than random corporate codes because the front desk knows what an airline badge looks like." No SW8-specific denial documented."

"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 “."

"I work as a consultant and frequently ask for and use my client's rates (at their insistence, since I will be billing them back). I have been asked for ID maybe one time in 15 since February, when it was announced in this forum that rates would be ID'ed."