Lloyds TSB has become the latest UK bank to be targeted by e-mail fraudsters, BBC News Online has learned.
Fraudsters are targeting British banking customers
The bank is warning its customers to watch out for a wave of bogus e-mails designed to extract personal bank details from them.
The false e-mails tell people their debit account will be cancelled unless they reconfirm their membership.
They are then directed to a website where they are asked to enter Visa debit card details.
Earlier this month, Barclays' customers were targeted in a similar scam.
Lloyds TSB said worried customers had been contacting the bank "over the last few hours".
The e-mail is sent under the guise of a "new security measure" which is meant to protect accounts against unauthorized charges.
Lloyds TSB customer helpline: 0845 3000 116
The e-mail says it will transfer a "random amount" between 25 and 99 pence into your debit card - but you are then redirected to a website and asked to type in banking details.
Lloyds TSB said it had been working "through the night" with the National High Tech Crime Unit, and the website has now been shut down.
The scam is indicative of the growing menace of e-mail fraud.
But it is believed to be the first time criminals have targeted Lloyds TSB customers.
Earlier this month, Barclays bank issued a warning to its customers, after about 400 of them received scam e-mails.
Lloyds TSB said the email appeared to have been sent randomly and was not specific to Lloyds TSB customers or internet banking users.
It said it only knew of one customer who had handed over their details - and this account had now been blocked by the bank.
In a statement, it said: "Lloyds TSB would never ask customers by email to enter or record any of their account details.
"This message is clearly displayed on the security section of our website and is being reiterated to all branch and telephone banking staff."
The bank says any customers who feel they could have been duped, should contact its helpline: 0845 3000 116.