I have a suggestion
N26 is one of the best user-friendly online bank. it provide also a fast costume service.

I have a suggestion :

in the case of multiple online subscriptions, one may forget to cancel unneeded services. For that, I decided to disable online payment ( unless I need it ). However, from time to time, I get "declined payment" notifications without information about who made this attempt and how much was it going to cost.

It would be nice to add this feature. 

Thank you.