Thousands of people received an unexpected gift on Christmas Day when European bank Santander mistakenly deposited £ 130 million ($ 176 million) in $ 75,000.
An error occurred when payments from 2,000 business accounts in the U.K. are processed twice, which means some employees double their pay, while providers also receive more than they expected.
The bank said the double payments were created by a "planning issue" that had been resolved.
It is now trying to recover fraudulent payments, many of which have gone into bank accounts used by rival banks.
"We are sorry that due to a technical problem, some payments from our corporate clients have been incorrectly copied into recipients' accounts," a Santander spokesman told CNBC.
"None of our customers have been left out of the pocket as a result and we will be working hard with many banks across the UK to repay the dues in the coming days."
Reports indicate that the incident may have calmed down some of the leading employees at Christmas and Boxing Day.
"It wasted my vacation time because I thought I had paid hundreds of thousands by mistake - I thought I had done something wrong," a salary manager reportedly told the BBC. "I thought it was just me and that I was going to get into trouble at work."
The payroll manager added that Santander had never shared how businesses should explain to employees a second payment or provide any information about how they should be paid, according to the report.
Santander said the reimbursement program was an indu strial proce ss known as a "bank fraud." He added that it had already started working with other banks in line with the process and that these banks would look to reimburse erroneous payments to their customers' accounts.Sa ntander said the reimbursement program was an industrial process known as a "bank fraud." He adde d that it had already started working with other banks in line with the process and that these banks would look to rei mburse erroneous payments to their customers' accounts.
It also has the power to refund directly to people's accounts.