I have never been asked for any documents. Even when flying home with Curri (who was a 6 month old puppy who had not yet had her rabies vac) . I do carry copies in my "diaper bag" but they may even be outdated now as I have yet to use them.
We have flown over a dozen times and stayed in numerous hotels. Petsmart in Michigan (when I went to get Sugar's nails clipped before I began using the dremel) was the only place that asked. I
DID have them with me, however, in the trusty diaper bag
So moral of the story is, it can't hurt to carry copies, even if they become old and discolored from under use ~ because you just never know when you may be asked
