Millions of shoppers could get up to £70 each after a tribunal approved a settlement in a lawsuit against Mastercard which stemmed from historic fees levied on businesses by the card provider.
The decision comes after a long-running legal case going back almost a decade, brought forward by a former financial ombudsman.
Walter Merricks argued that shoppers were charged higher prices after fees were wrongly levied on transactions made over a 15-year period between 1992 and 2008.
It is not necessary to have owned a Mastercard at any point to be eligible for compensation. Mastercard declined to comment on the court ruling.