B270898 is for employees of Hewlett Packard on business travel--not Costco. Keep in mind that just because one person was not asked for ID one time in a particular location doesn't really mean anything. Corporate rates often have heavily discounted rates, and there are numerous posts from folks on these forums who have been challenged for ID and then charged the walk-up rate if they can't produce it. Rates that include CDW are riskier still since any damage claim will trigger additional review.