But why offload them at all 4 hours before the flight? Ok,so you want to be sure it isn’t some kind of cc fraud, fine. Passenger needs to show the cc at first point of contact at the airport, if he can all is well and he can get on. If not you offload, call the police, do whatever you need to do. I really don’t see the point of the offloading at the time at which it was done. If it is because the flight was filling up and you want so be sure passenger will be there with the cc for heaven’s sake call before offloading.