I've posted this before, it happened years ago...

While checking in I was asked for proof that I worked for my company. I pointed out the credit card in the desk clerk's hand was a corporate Amex, showing the company name and logo. Nope. That wasn't good enough. The clerk explained she needed to see a biz card, so I reached in my bag, found one and showed it to her. She had no comprehension that anyone could get a cardboard card printed off a home computer, but the company is only going to issue credit cards to actual employees.