You cannot have BankID without having a personnummer, for which you need to be a resident or citizen (Swish uses BankID for identification for those who are not familiar with it).
Yeah, in Sweden you basically don't exist if you don't have a personnummer, yeah.
I'm a citizen and have a personnummer, but because I'm not a resident I'm not in SPAR. But I need to be neither in SPAR nor a resident for BankID or Swish.
I even managed to pick up a parcel my saying my personnummer, when they couldn't scan it off of my British driving license.
