I used the term authorise and I agree it was incorrect. What I disagree with is hotels taking money that is not due to them, not properly checking their facts and not notifying guests when they do make a back charge. Guests should have the right to dispute charges and taking a largish sum from a card could in fact leave some guests in a financially difficult position. I'm not even talking about legal responsibilities here, as that would be difficult to discuss given the international aspect of travel, but simply a businesses way of treating their customers. An automated email is surely not difficult and surely the appropriate way for a business to conduct themselves.....unless they know by NOT telling people, they get away with it lots more times, which in my way of thinking is deceptive conduct and not a good way to treat customers who they may hope will return some day.