"IBM (US) Hilton code 0901452 is the domestic US IBM Hilton code. Same enforcement profile as the International IBM code: low US domestic verification rate (well under 10%) but higher at airport corridor properties known for corporate code abuse enforcement. London and European Hilton properties significantly increased enforcement post-2022. IBM's massive employee headcount and Hilton partnership status means the code is deeply embedded in Hilton's GDS system with occasional automated audit flags for first-time users."

"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."

"I know that previously the Hertz IBM rate was always fixed in the mid $30s for a full size vehicle with last car availability. A minivan was $175/week in Orlando even during President's week when the going rate was about $1,200. This is probably why Hertz and at least Avis has been more strict. I have found Marriott to be very strict, especially at key locations, when it comes to the government rate. Marriott wants travel orders, a government ID, and/or a government credit card. I found Hilton to be less strict for those government rates."