Fines which were wrongly issued to tram passengers who had paid for their tickets are being blamed on “human error”.
Customers complained they had their tickets checked by on-platform inspectors at the end of their journey but were still charged £60.
Transport for Greater Manchester (TfGM) has apologised and asked those affected to appeal, adding: “Mistakes can sometimes be made.”
All Metrolink users must tap their pass in and out at the start and end of their tram journey to avoid penalty fares.