"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."

"I work for a company that is partially owned by a Fortune 100 company and we have their corporate rate code linked to our travel website, (although it is one of the ones that is very easy to figure out). In 4+ years I've never been asked for any ID, although a few times a year I get the question of "what company are you with?""

"Bank One's Marriott code BOB may still exist in Marriott's GDS system following the 2004 acquisition by JPMorgan Chase. JPMorgan has a separate Marriott code (JPM). Legacy acquired-company codes are practically never verified as the hotel has no way to confirm employer identity for a company that no longer exists independently. Risk for legacy codes is negligible."