"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."

"Thanks for the prompt response. It's odd - the difference in the rate I booked and the next cheapest Hhonors rate was only £20! It just doesn't seem worth the effort of protecting even if I had, somehow acquired the code when I shouldn't have. Do please report back on your stay - will be interesting to note if you are also asked for some ID."

"One thing I am curious about is whether the hotel CRM shows the booking channel. Most true corporate travel is booked through something like Concur, AMEX GBT, CWT, etc. If the agent sees the booking come through one of those channels with a person's name on it and then gets a card or photo ID (not corporate ID) from said person, it's a pretty low fraud risk. But if it is a reservation through the hotel's channels using just a typed-in code, then I'd think they would have reason to be more strict in seeking proof of affiliation."