"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 only ever been asked about it once and I basically said "Yes I work there" and there were no follow up questions. That was on a personal trip but booked through the portal Hilton set up that allows employees to book personal travel using the corporate rate."

"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."