The fact that it says this does not guarantee that you will be asked for ID. I've been asked for corporate ID when traveling on partner or customer business and using their rates. I've had issues three times. The first time was in Beijing and I ended up paying rack rate. The second time was in Hong Kong I ensured someone from the partner company met me when I checked-in. They had an argument with front desk and eventually I was charged the correct rate. The last time was in Montreal. I was traveling with a partner and our joint prospect. The partner had arranged all the travel and simply given me the confirmation codes. When I checked in they asked for ID. I showed the partner document with the reservation details. They didn't care and marked the room at rack rate. A few hours later the partner arrived and verified that I was with them. The rate was then reduced to the correct price.

So two cases in Asia and one in North America. As always, YMMV.