TUESDAY 6 AUGUST 2019500,000 Monzo customers
urged to change pin codes
Digital bank says account information was wrongly stored on internal system (PA)
PETER STUBLEY
Monzo has warned around half a million of its customers to change their security codes after discovering a
“bug” in its internal system. The British digital bank revealed that some PINs (personal identification
numbers) had been wrongly stored in encrypted log files visible to its engineers.
Since the glitch was spotted on Friday the company has released updates to its apps and deleted the
information to ensure it was no longer accessible. The company, writing on its blog, sought to reassure
customers that “nobody outside Monzo had access to these PINs”.
“We’ve checked all the accounts that have been affected by this bug thoroughly, and confirmed the