information hasn’t been used to commit fraud,” it added. “Just in case, we’ve messaged everyone that’s
been affected to let them know they should change their PIN by going to a cash machine.”
Monzo said that the issue affected less than a fifth of its 2.5 million UK customers, but urged all users to
update their apps to the latest version.
“If we haven’t emailed you, you haven’t been affected,” the company said. ”But you should still update your
app to the latest version. We’re really sorry about this. Please get in touch with us if you have any questions
or concerns.”
It comes as Monzo tests a monthly subscription service for its new metal bank card. Customers would pay
up to £7.50 per month over a year – in addition to the minimum of £6 a month for the premium Monzo
Plus service, according to reports.
Last month the bank apologised to customers for system problems which left some users unable to log in,
send or receive payments or view their balances. The company said it was caused by a routine upgrade to
the bank’s online platform.