(22 Jul 2019, 8:09 am)Adrian wrote
I'd imagine it would be difficult because I don't think that the QR codes aren't stored centrally to validate them on scan, but merely contain an encrypted expiry date within the QR code.
It's not difficult as Arriva had the machines updated (hence why they no longer rip QRs) to make sure that reused returns got rejected, it's the same at a few other companies too.