"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."

"HotelCorporateCodes.com rates the Marriott DIS code as "Sometimes" for ID verification. No dedicated forum thread found specifically discussing Disney corporate code verification incidents. Disney has 140,000+ US employees and the code is widely circulated. One FlyerTalk user noted that a retired employee who disclosed their retired status was never asked for ID, suggesting properties prioritize rate code volume over strict verification. FL Marriott properties near Orlando HQ are most familiar with the code."

"FlyerTalk community specifically notes the MMM code as "the go-to code for the Minneapolis/St. Paul area, described as extremely reliable at local Courtyard and Residence Inn properties, with a low risk rating." One user documented using an IBM rate for 14 years at 80-100+ nights annually and "never once being asked for an ID." Another stayed 500+ nights and was never asked. The 3M code is regionally well-known near 3M's Minnesota HQ."