This happened to me once - 2 nits at a FS in LA. Didn't see it before the stay, but I was credited the points. I contacted MR to make sure I didn't get charged on my card on file - they assured me no. I ended up getting the pts (nothing big) but would be leery abt somehow getting charged for damages. He will need To give credit card on checkin, so you should be good...but if they mess up something like a MR number then who is To say they wont botch the cc number too.