"The AMX code for American Express employees is widely circulated. Community members note that "neither Amex Platinum nor Amex Bonvoy cardholders have any special corporate codes — this is strictly for Amex employees." Hotel staff may require employee verification. No specific denial cases documented, but risk noted as moderate given Amex's large employee headcount makes staff less suspicious of claimants."

"I occasionally try to get the corporate rate for a company I'm visiting in the area (for sales/consulting). Only once has a front desk clerk asked me to prove my eligibility, and she was satisfied by me giving the name and telephone number of the person I was visiting."

"My last couple of corporate RFID cards had no company name on them for security purposes. My current company doesn’t do business cards. I use my Bonvoy card for corporate travel to get the points. I’d have to write them an email standing at the check in desk, I guess."