European smartphone-only bank Number26 is facing a Twitter backlash after cancelling the accounts of hundreds of customers, many of whom claim to have been given no explanation.
The German-based challenger, which is hoping to cash in on customer dissatisfaction with traditional banks, now operates in seven counties and claims more than 150,000 users.
Yet in the last few weeks the company has begun sending out emails to customers telling them that their accounts have been cancelled and will be closed within two months.
In a statement, Number26 says that the cancellations notices have been sent to a "few hundred" people, adding that "in the context of our fast growth, the number of affected accounts is insignificant".
The firm insists that there is a reason for each closure but that it cannot comment on specific cases for data protection reasons.
But the claim that the closures are just normal practice has been given short shrift on Twitter, where customers are expressing their bemusement and anger.