The Citizen Advice Bureau website has more advice for customers who fear they have been the victim of a phishing scam.
It said: “Some scammers try to get your personal information, for example the name of your primary school or your National Insurance number.
“They can use this information to hack your accounts. If you come across sites that ask for this type of information without an obvious reason, check they’re legitimate.”
Separately, Which? Travel have warned British holidaymakers that criminals are taking advantage of the pandemic to scam people.