> Does a paper ticket do anything to prevent this? Ticket inspectors used to mark the tickets so they'd know if someone was reusing a ticket. Originally it wou

> Does a paper ticket do anything to prevent this? Ticket inspectors used to mark the tickets so they'd know if someone was reusing a ticket. Originally it would be clipped, then date stamped, and towards the end on South West Trains it was a scribble of biro (or black marker if you were unlucky). On the occasional trips I take I now use an e-ticket. I have never had the QR(ish) code on it scanned for validity.