Information including name, email address, home address, phone number, the last four digits of card numbers, bank account numbers, and sort codes may have all stolen in the data theft.
Payday loan company Wonga has admitted to suffering a data breach that could have resulted in the theft of the personal data of 245,000 United Kingdom customers.
It says it does not believe customers' Wonga account passwords were compromised but suggests concerned users change their password anyway.
The page advises that customers should alert their banks and ask them to be more alert to any suspicious activity, to be more conscious of any online or phone-based scam attempts and to contact the dedicated Wonga helpline for more information.
Wonga says it is informing customers' banks of the situation, to help them detect any fraud.
'We sincerely apologise for the inconvenience caused'.
Those caught up in the breach will receive a message that reads: "We believe there may have been illegal and unauthorised access to some of your personal data on your Wonga.com account".
According to the Guardian, Wonga became aware of a problem last week, however only worked out on Friday that data could be accessed externally.
Luckily, the customers aren't even close to being from South Africa, but if you're tired about using a company who has already been breached, SA Personal Loans has your back.
On top of this, a further 25,000 customers in Poland might have also been affected.
As if things aren't already looking bad for Wonga, the company could be taken to task if the Information Commissioner's Office finds that its security measures were inadequate. "If this happens, we recommend that you hang up", Wonga said. The lender, which advertised heavily on TV and through football sponsorships, was found by the financial regulator to have made loans to customers who could not afford to repay them, and to have chased bad debts with letters from a fake law firm.
Its pre-tax losses grew to £80.2m that year from £38.1m in 2014.