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Over 600,000 Tesco Clubcard accounts may have been hit by 'fraudulent activity'

Up to 620,000 Tesco Clubcard accounts may have been subject to fraudulent activity, the supermarket has said.

Tesco says that password and username combinations may have been stolen from other websites and used to try to access Tesco accounts where customers used the same username and password.

The supermarket says that no one will lose the value of any of their Clubcard vouchers or points, but it will be issuing new cards and vouchers. It says it is contacting affected customers and telling them to reset their passwords.

I've been affected – what should I do?

If you're affected, it's worth changing your password.

Otherwise, you don't need to do anything, but if you have concerns, you can contact Tesco customer services on 0800 50 5555.

What does Tesco say?

A Tesco spokesperson said: "We are aware of some fraudulent activity around the redemption of a small proportion of our customers' Clubcard vouchers.

"We have strict security measures in place and our priority is protecting our customers. Our internal systems picked this up quickly and we immediately took steps to protect our customers and restrict access to their accounts. At no point was any customer's financial data accessed.

"We have asked customers affected to reset their passwords and are contacting customers whose Clubcard vouchers may have been affected to let them know that we will replace these vouchers and issue new Clubcards as a precaution. We are sorry for any inconvenience this may cause."

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