"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."

"I've been asked about it exactly once. I was doing some personal travel internationally. Hilton actually provides a custom landing page so we can book personal travel using the corporate rate. Anyway, the conversation amounted to: Hilton - "Do you work for Spacely Sprockets?" Me - "Yes." That was it. No other verification was asked for."

"I run a Consultancy and work with clients across both Public and Private sectors. Many years ago (15?) a UK Government client (they are still an active client) shared a Hilton Corporate Code, which was to be used for stays required when working with them. This code gives access to (but not 'On Duty' rates). I use this code regularly across the UK (mainly London) without issue, staying most months at various London Hiltons."