"I use IBM’s corporate code and have never been asked for ID once. Also never have worked for IBM"

"If you book under IBM's discount, you need to have an IBM ID at check-in. Employment verification documents (badge, business card, email screenshot) should be carried in case of verification. If caught using without ID, they will charge walk-in rate."

"I would think that if the discount isn't significant then enforcement isn't really worth it. However, if you can get a Marriott for $99 when the rack rate is $198/night, the hotel may be more inclined to verify that the guest qualifies for that rate. I have been at the AVIS counter and a CSR is demanding corporate ID from the person next to me. I wasn't asked and I was on a really good corporate rate."