Originally Posted by formeraa

Of course an agent can pretty much do anything they want. But I insist on a printed receipt because it is powerful evidence that I owe nothing at checkout. So, if an agent adds something fraudulent or accidentally, I have some evidence with which to dispute the claim. And, yes, I have had so-called reputable hotels make errors (e.g. charging someone else's room service to my account or charging me for minibar purchases that I did not make).

I do agree with other posters here that an immediate email is an acceptable substitute.