"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've been given codes for several chains from family/friends who are entitled to have them. All have assured me they have never been asked to provide company ID when checking in. In fact I was told they give the codes out to visiting clients who won't have ID anyway."

"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?""