Football's digital ticket revolution has provoked outrage among fans, leaving Premier League clubs scrambling to deal with complaints.
Several clubs made the switch from paper and plastic to season tickets on smartphones last season, sparking chaos at the turnstiles and criticism from fans' groups. Now more are set to follow as the new season starts.
On Wednesday, West Ham agreed a print-at-home option on tickets after complaints from supporters who could not, or did not want to, download tickets on to their phones. Fans also launched an online petition.
Crystal Palace have backed down on plans to introduce a £40 membership fee for anyone wanting to transfer or resell digital season tickets for certain games.