On March 12, some customers logging into their banking app with Lloyds Bank, Halifax and Bank of Scotland, all part of the Lloyds Banking Group in the UK, saw something that immediately felt wrong. Instead of their own transactions, the app briefly displayed activity that appeared to belong to other people.
Users reported seeing unfamiliar payments, account numbers, and sort codes while checking their balances online. The issue appeared across apps connected to the Lloyds Banking Group, which owns all three.
For some customers, the transactions vanished after refreshing the app or logging out. One user told the bank on social media that they could see “account numbers, sort codes and names” belonging to someone else. Another said the app suddenly showed “a series of random transactions on my current account statement that don’t belong to me.”
The bank later acknowledged the issue, saying: “We’re sorry that some customers experienced an issue viewing transactions in the app for a short time this morning. The issue was quickly resolved and we’re looking into what happened.”
How something like this can happen
Incidents like this usually trace back to how banking apps retrieve and display data rather than to accounts being directly hacked. Most modern banking apps rely on complex backend systems that store customer data in large databases. When a user opens the app, the system sends a request to retrieve account information linked to that specific user ID. The app then displays the results in real time.
If a technical glitch occurs, such as a caching error, database indexing problem, or temporary mix-up in session data, the system may briefly return information tied to the wrong account. That means the app could display another customer’s transactions even though the underlying accounts remain separate.
These errors tend to appear suddenly and disappear just as quickly once the system refreshes or reconnects to the correct data source. That seems to match what some customers described. Several users said the unfamiliar transactions disappeared once they refreshed the app or logged back in.
Why it raises serious concerns
Even if temporary, the situation raises significant privacy questions. Financial information ranks among the most sensitive personal data, and seeing another person’s account details suggests that internal safeguards briefly failed. Consumer advocate Martin Lewis said the scale of complaints suggested the problem may have affected many users.
“This was a huge issue,” Lewis said on his podcast, noting that his team had received thousands of messages from concerned customers. “A lot of people are quite angry about this, you are seeing someone else’s personal data.” According to Lewis, the situation could potentially involve General Data Protection Regulation considerations if personal financial information was exposed.
What happens next
For customers, the most immediate concern is whether their accounts were accessed or money moved. In cases like this, banks typically investigate system logs to confirm whether the issue was purely a display error or something deeper. So far, Lloyds says the issue was short-lived and has already been resolved.
Jemi Motesho
