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Revolut has retained an unwanted crown as the UK firm with the most fraud and scam complaints, according to figures obtained by consumer group Which?
A Freedom of Information request to the Financial Ombudsman Service (FOS) revealed that customers of the London-based fintech referred more cases of authorised push payment (APP) fraud to the watchdog than any other provider in 2024, and the trend has continued into 2025.
In 2024, Revolut customers escalated 3,242 APP fraud complaints, well ahead of Monzo with 2,344 and Barclays with 1,704. Non-APP fraud disputes told a similar story, with Revolut accounting for 2,631 cases, compared with Monzo’s 1,810 and Barclays’ 1,461. For the first eight months of 2025, the same three firms dominate the table, with Monzo and Barclays swapping second and third place.
The Ombudsman also found Revolut had one of the highest rates of cases upheld in favour of customers. For non-APP scams in 2025 to date, 37% of complaints were resolved in favour of the complainant, suggesting many customers had initially been turned down for reimbursement. Monzo, meanwhile, recorded the highest uphold rate for APP fraud complaints, indicating its customers were most likely to have been wrongly refused repayment in the first place.
The figures come against the backdrop of sweeping changes in fraud rules. Since October 2024, banks and payment firms have been required to reimburse APP fraud victims on the Faster Payments system, up to £85,000 per case. Liability is shared equally between the sending and receiving institutions, placing new scrutiny on firms whose accounts are frequently used as conduits for criminal funds.
Revolut stands out in that regard. Payment Systems Regulator (PSR) data shows that in 2023, for every £1m received into Revolut consumer accounts, £756 was tied to APP fraud. While some smaller payment firms posted even worse ratios, the figure was far higher than those reported by the main high street banks or digital rivals such as Starling and Monzo.
Consumer advocates argue that Revolut’s structure leaves it particularly exposed. With millions of UK users—often active in cross-border transfers, crypto trading and online marketplaces—the company offers an attractive target for fraudsters and money-mule recruiters. In 2023, Action Fraud received nearly 10,000 complaints naming Revolut, more than Barclays, Lloyds or HSBC.
The firm has also faced questions from regulators overseas. In April this year, the Bank of Lithuania fined Revolut €3.5 million over anti-money-laundering control failures. The central bank stressed no actual laundering had been uncovered, but the case added to the perception of weak defences.
Revolut rejects the suggestion it is lagging peers on fraud. “Each potential fraud case concerning a Revolut customer is carefully investigated and assessed independently,” the company said in a statement. It highlighted the scale of its investment, noting that more than a third of its 10,000-plus staff now work in financial crime, and that half of its data scientists focus on fraud prevention. “We analyse over a billion transactions a month,” the firm added, claiming to have prevented £600 million of potential fraud in 2024 alone.
Still, the Ombudsman’s tables suggest customer dissatisfaction remains high. For victims, the wait for redress can be long: Which? reported earlier cases where individuals lost six-figure sums and had to battle through appeals lasting more than a year before being reimbursed.
With reimbursement rules toughened, the financial regulator’s next scorecard will reveal whether Revolut has managed to stem the tide of mule accounts and improve its standing—or whether Britain’s biggest digital bank by user numbers will continue to dominate the fraud complaints league.
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