"Nissan's Marriott code NIS is an automotive corporate code. Nissan's US HQ is in Franklin TN (Nashville area) with manufacturing in Smyrna TN and Canton MS. No FlyerTalk thread discusses NIS verification incidents. Automotive codes at Marriott are rated 'Low' enforcement overall — hotel staff in auto-manufacturing markets are familiar with major OEM codes but rates are modest enough that enforcement is rarely triggered. No specific NIS denial documented."

"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."

"I'm guessing so, but I'm not a Marriott employee. Also, to answer some of the other questions floating around here, I have never been asked to produce my work ID when checking into the hotel that I booked using a corporate rate. I travel half a dozen times a year."