"DaimlerChrysler's Marriott code DCX was the merged Daimler-Chrysler entity code (1998-2007 merger). The company later split back into Daimler AG and Chrysler. The code likely remains active in Marriott GDS with one of the successor company relationships. Auto industry codes at Marriott carry medium risk — properties near Auburn Hills MI (Chrysler HQ) and Stuttgart recognize auto company employees. FlyerTalk notes that European Marriotts verify auto company codes more frequently than US properties."

"My employer does not have a corporate rate but when I'm consulting for a company that does, I use theirs. I've only been challenged for identification once. In that one situation I explained the consulting arrangement, and the desk clerk accepted it without a badge or business card (neither of which I had anyway)."

"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."