Customers paid twice due to a problem with card terminals run by Cardnet, despite Transactions only showing up once on receipts.
The error affected around 5% of payments made on machines on 29 August.


Cardnet is a payment system run by Lloyds Bank and card processor First Data, which handles 1.1 billion transactions a year, including for a wide range of shops, restaurants and businesses in Britain.


This means that Lloyds customers were not the only ones affected, since the machines accept most Mastercard and Visa payments.


Customers will have to check their bank statements for duplicate payments - but they should have been automatically reimbursed.




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