Customers of Lloyds, Halifax and Bank of Scotland reported seeing unfamiliar transactions in their banking apps, prompting an investigation by Lloyds Banking Group into a digital banking glitch that briefly displayed other users’ transaction information.
Lloyds Banking Group has launched an investigation after customers reported being able to view transactions belonging to other users while using its mobile banking app and online platform today (12 March).
The issue affected customers using apps operated by the group’s retail brands, including Lloyds Bank, Halifax and Bank of Scotland.
Reports began circulating on social media on Thursday morning, with customers stating that unfamiliar payments and transaction histories were appearing in their accounts. Screenshots shared online suggested some users could briefly view transaction details associated with other customers.
In a statement posted to its customer support channel on X, Lloyds confirmed that the issue had been identified and resolved.
“This morning we incorrectly showed transaction information from some accounts to other customers in Internet Banking and the mobile app. We’re sorry this happened,” the bank said.
“This issue was quickly identified and resolved. We can assure you that nobody had access to your accounts. We’re currently reviewing what happened to ensure this cannot occur again. Protecting our customers’ personal information and account security remains our priority.”
Data display error
Lloyds stated that the incident involved the display of transaction information, rather than unauthorised access to customer accounts.
The bank said the problem occurred within its Internet Banking service and mobile application, though it did not provide further technical details about the underlying cause.
Digital banking platforms typically rely on multiple backend systems and application programming interfaces (APIs) to retrieve account information and transaction histories in real time. When customers log into a banking app, the interface requests data from these systems and displays it within the user’s account dashboard.
While Lloyds has not confirmed the precise cause of the glitch, incidents involving incorrect transaction displays have previously been linked to errors in the way account data is retrieved or cached within digital banking platforms.
The group said it is now reviewing the incident internally.
Scrutiny over financial data security
The episode comes at a time when banks are under increasing scrutiny over the security and handling of customer financial data as digital channels become the dominant way consumers interact with their accounts.
Mobile banking apps are now the primary access point for millions of UK customers, with banks investing heavily in digital infrastructure to support real-time payments, account aggregation and third-party integrations.
The UK’s regulatory framework has also encouraged the expansion of data sharing through initiatives such as Open Banking UK framework, which enables authorised fintech companies to access account information via secure APIs when customers grant permission.
While the Lloyds incident appears to have occurred within the bank’s own systems, it highlights the growing importance of data integrity within digital financial infrastructure, particularly as financial services rely on increasingly interconnected technology stacks.
Banks are required to maintain strict controls around customer data under UK financial regulation and data protection rules, including oversight from the Financial Conduct Authority and the Information Commissioner’s Office.
Lloyds said it is continuing to review the incident to determine what caused the error and to ensure it cannot occur again.
