Northern Rail said its ticketing system is now working as normal after it broke down allowing train commuters in the North West to travel for free on Tuesday morning.
A Northern Rail spokesperson said: "At 06.30am this morning a server failure occurred affecting our ticket offices across the North West. This happened at 67 stations and the problem has now been rectified.
"We provide our customers with alternative opportunities to purchase tickets, 25 of these stations have a Ticket Vending Machine (a self-service ticket machine), and customers also have the opportunity to purchase a ticket on board trains, and we have no reported wide spread issues with this service."
Passengers who were travelling on the Manchester to Liverpool line and lines connecting Blackpool, Preston and Manchester were unable to buy tickets.