A hacking attack on Tesco Bank last month left 9,000 customers out of pocket and many more wondering whether their money was safe.
The bank is estimated to have paid out £2.5 million to its customers since the attack which saw online transactions frozen. And Tesco is only the latest to fall prey to a cyber-attack or computer system problem.
Earlier this year millions of HSBC customer were locked out of their accounts after a security breach while thousands of TalkTalk customers have had their personal details accessed in recent years.
Fraud alert: Tesco customers were warned to look out for fake emails, phone calls and texts
Any weakness in a company’s security can leave it dangerously