"Coca-Cola's Marriott code COK appears in multiple FlyerTalk code compilation threads and third-party aggregators. The code has been publicly circulated for many years. Coca-Cola's global HQ is in Atlanta GA, and Marriott properties in Atlanta Midtown/Buckhead likely encounter many genuine Coca-Cola employees. No specific denial cases were found. Full-service Atlanta properties carry higher verification risk, while select-service properties nationwide are unlikely to check."

"AT&T is among the companies with the best Marriott negotiated rates. In the US, I've never been asked to show corporate ID. In Asia and Europe, I've been asked for corporate ID every single time. Since some companies don't put their name on badges for security reasons, the business card route is often tried first and usually accepted."

"I also use AAA if the corporate is not available. In 10+ years of using AAA I had never been asked to show the card until last month in FL at two different properties. One was a HGI in Palm Beach Gardens and the other a CY in Stuart. Stayed at both since on AAA rate and wasn't asked."