I tried to register for an account with N26 early this year. After uploading all my personal information and passport scans, I received a generic rejection notice almost immediately. Extensively talked to the customer service, but they couldn't possibly figure out the rejection reason and eventually just stopped replying.

N26 appears to be one of those modern companies built on automation and algorithms where human customer service is an afterthought. It'll work until it doesn't - and then you're on your own. Wouldn't recommend using them to handle significant amounts of money.