What pisses me off to no end is the local (very popular) app Vipps for sending other people cash, e.g. to split a bill or buy something at a garage sale or whatever. Not only does it use phone numbers to identify the people you send money to, but it explicitly disallows two people with different phone numbers to have a shared bank account. Husband and wife with common debit account? Sorry, unsupported. WTF? What happens if someone switches bank (and thus account number) or phone number? Who knows, maybe you sent money to a stranger. This app is made by the banks.
I don’t think bank account numbers are re-used. So in that case the transaction would just fail. And no one changes phone number in Norway. With a few exceptions of course.
