A bank accidentally paid thousands of people more than $175 million on Christmas Day due to a technical glitch
Santander UK is trying to recoup $175.9 million that it paid to customers by mistake.
A technical error meant that 75,000 scheduled payments were accidentally duplicated.
One person affected told Insider that she thought she'd been paid twice on Christmas Day.
Santander UK is trying to recoup about $175 million (130 million pounds) that it accidentally transferred to customers on Christmas Day.
A technical error led 75,000 scheduled and one-off payments to be paid twice by the bank's system, The Times of London first reported.
A spokesperson for the bank said that the error had been identified and rectified. The bank will work to recover the duplicated transactions over the coming days, the spokesperson added.
The error affected 2,000 commercial and corporate accounts, which means many of those receiving money are employees or suppliers, who are customers of different banks, The Times reported.
Jenny, a UK resident who did not want to provide her surname, was among those affected. She told Insider that she thought she'd been paid twice.
She received her scheduled wage of 1,764.50 pounds on December 24. She then received a second payment for the same amount the next day. Both were listed as being from her employer, but when she contacted them they said they hadn't paid the money.
After investigating, her employer said the bank would be resolving the issue and that she didn't need to do anything.
The payments came from Santander's own funds, so individuals were unaffected. Nevertheless, Jenny described it as "frustrating."
She added: "It was confusing, I just wanted it out of my account because it's hard to tell how much money you have."
The Santander spokesperson told Insider that the problem affected only UK customers and that the process for recovering the funds is "underway and working effectively."
The industry's bank-error recovery process enables banks to retrieve transactions from third-party banks. In some cases, Santander could also contact those affected directly.
According to Jenny's bank statement, seen by Insider, the second payment of 1,764.50 pounds was retracted on December 30. Jenny is a customer of a different bank, NatWest. This suggests that at least some of the challenges Santander was facing have been resolved.
The spokesperson did not give a time frame for when the issue will be fully resolved.
Spanish-owned Santander has 14 million active customers and about 20,000 employees.
Banks' digital-payment systems can be prone to errors. It's not the first glitch to affect Santander's payments this year. In May, some customers were unable to pay for goods after a technical issue temporarily affected card payments.
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