"Oracle's Hilton corporate code is widely circulated on public code-sharing sites. UK and Asia-Pacific Hilton properties have introduced systematic ID checks. Oracle being a high-profile tech employer near numerous Hilton properties (San Jose, Austin, London) means front desk staff are more likely to recognize Oracle employee IDs and actively request them."

"Hilton and Marriott Japan actually do check to ensure you qualify for any special rates. They also scan your passport too just FYI. It's not the wild west out here. Be prepared to prove you are eligible for the code or have the rate switched if you can't. Hope you got a business card from your company."

"I called the hotel and spoke with someone who was adamant that I had booked a Government On Business rate and would need to show Government ID. I explained that there was a difference between having access to a Corp code which allowed access to HM UK Government rates (which I have done regularly for 15 years) and booking an OnBusiness Government rate directly by clicking the box on Hilton.com (which I have never done). She wasn't moving and insisted this was the same thing."