you guys should really chill out. the fact is that most companies wouldnt mind or care at all if you used their "corp code" in fact.. the more its used the more the corp can justify a larger discount with the hotel entitiy. (this is why you see the best rates with the largest companies). Now dont get me wrong.. b/c of written agreements they arent jst going to post their codes everywhere (because its stated in their agreements .. most of them anyway) that they wont disclose that info.. but they certainly dont mind..

I've been using corp rates for hotels for about a decade now. I've never been "checked" and would honestly LAUGH at the hotel clerk if he/she ever asked for any identification (other than drivers license and CCard). hotels in other countries have a different culture about the service business. thats why things may be different there.