The Bankers' Association is warning about the dangers of email scams.
The scams - which are known as 'whaling scams' - involve fake emails that purport to come from a senior executive in a company.
They are often written in legal language and request payment of money.
Bankers' Association chief executive Karen Scott-Howman said she herself was the target of the scam.
She said someone had sent an email, purporting to be from her, demanding money for a payment-obligation that did not exist.
Ms Scott-Howman said she had alerted the banks to this scam because it shows no organisation or individual is immune to whaling scams.