I agree on this.... but it could happen. We didn't get a single. I received one in the end to my email, with what I owed (daily fees for me and our daughter) and mine was charged to my card. I assume he got one and his daily fees where paid with his card. They didn't show up on my CC, so I am assuming they did his. I don't know if it being CAS made it weird or something else. If I was traveling with someone else, I would hope there was no question as to who paid which things. I would hope what was swiped with their room key went on their credit card and what I did went on mine. While I wouldn't be staying with anyone who I "Couldn't" work it out with.... but I probably wouldn't mention it, and hope they would if they knew their charges went on my account and not theirs. I might pull it up in the room and casually say, hummm, I wonder why this is on my account and not yours, but not push it, in hopes they would make it right. I MIGHT be a pushover who doesn't like confrontation.... EVEN if it wouldn't be a big deal.