"Boeing's Marriott corporate code is widely shared online, partly because Boeing has major campuses near Seattle, Chicago, and Charleston — cities where Marriott properties are plentiful. One industry source rates Boeing's code as "Medium Risk," noting verification is more common near Boeing facilities. FlyerTalk documents cases of consultants using codes and being charged $300 (rack) vs. $100 (corp) when failing to produce company ID. Boeing is a defense/aerospace firm with recognizable employee badges."

"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."