"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."

"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."

"I can say, with absolute certainty, I've never been asked for a Corporate ID: only a business card. Despite working for a company towards the top of the F50 list, I am a remote employee. Remote employees are not given IDs in our company. When I do have to go to the office, I need to get a guest ID."