You can always access your BOG FP+ reservation anytime on the same (separate) website you make your reservation on once it is made. You log in & select View or modify Reservation to see and/or change your reservation. As far as proof.. you can email the reservation to yourself or take a screen cap, just in case... I have not heard of anyone being asked for anything other then the name on their reservation when checking in at BOG. I have heard of reservations not showing up, but once the email or screen cap was shown the reservation was honored.