"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."

"We know what the various Deloitte, EY, PwC, Google, Meta, etc badges look like. If you work for the company, it’s not a problem to verify that you work there. We do this for the random people that say they work for Deloitte, when in reality, they just refill the vending machine at a Deloitte office."

"I have been asked to show some proof couple of times. I normally show my corp id but credit card with employers name on it has worked, too. As would probably just showing my laptop with employer e-mail account or whatever. My impression has been they are happy with just about anything that proves I'm working for the company whose rate I use and why wouldn't they."