"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."

"I think the generic 'show corp id' designation means show the company business card. I think a lot of us don't have them or, if we do & we're not going to an office that we'd need to show them, leave them at home. I worked for some F500s that didn't require corp ids with shiny smiling faces on them & others that did; same with company credit cards. All, however, provided biz cards when working for them."

"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."