Seems to vary quite a bit and as already stated, calling is a good idea but you are more likely not going to get a good straight answer and showing almost any ID, assuming you are asked, will usually be fine. On the other hand, a few years ago I was asked to show my "current" check stub, since "an ID could no longer be valid." My advice if you think you qualify is to book it and if worse comes to worse, you end up paying a slightly higher rate or leave and stay elsewhere!