"United Airlines' Marriott code UAL is an airline employee code. United employee IDs are company-issued physical badges. Properties near United hubs (Chicago O'Hare, Newark, Houston Bush, Denver, San Francisco) regularly handle United crew and employees. FlyerTalk's airline 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 UAL-specific denial documented. Airport corridor Marriott properties: moderate enforcement."

"My last couple of corporate RFID cards had no company name on them for security purposes. My current company doesn’t do business cards. I use my Bonvoy card for corporate travel to get the points. I’d have to write them an email standing at the check in desk, I guess."

"I work for the front desk, at a Marriott, & have for the last 8 years .... So when it comes to room upgrades; it goes based on AVAILABILITY... sometimes no matter the tier, if we have it available - I will upgrade the guest. Now of course, higher tiered members get dibs on the upgrades first but after we go through the higher tiered members, Ambassador, Titanium, Platinum - then we go through the other ones. I cannot express this enough : BEING NICE & POLITE AT THE DESK GOES A LONG WA"