Barclays customers face being charged twice as the high street lender tries to fix a debit card payment glitch.
However, by Monday afternoon the bank said the problem had been fixed, and all customers had been refunded.
Some customers vented their anger on Twitter in the morning saying the system error has left them overdrawn.
Theresa Worthington tweeted: “I had a text today to say I'm overdrawn I have been charged twice for two things I've purchased over the weekend why”.
Another customer said that Barlcays had inadvertently taken a £4,000 payment twice.
A Barclays spokesperson confirmed the issue was affecting all card transactions but stressed that customer bank balances would be restored.
The bank has not disclosed the exact number of accounts affected by the issue or what caused the problem.
Barclays said: "We detected a small number of duplicated debit card payments this morning."
"We are working to fix this and refund customers as soon as possible. We apologise for any inconvenience caused and affected customers will not be out of pocket."
Customers are advised to check their statements to make sure any potential duplicate payments are refunded.
This is the latest issues affecting Barclays debit card payments.
In April, Barclays customers complained that they were unable to make payments from their accounts, an issue for which the bank later apologised and attributed to a routine systems update.
While in October last year, Barclays customers had trouble getting cash from their accounts after the bank was hit by a system glitch as the clocks changed to Greenwich Mean Time.
Barclays’s payment glitch follows a similar problem with card payments at Asda over the weekend.
The problem left thousands of customers facing long queues at the store’s checkouts across the UK.
Additional reporting by PA
