The electronic ID hosts a cryptographic key that can be used through some sort of hardware device in order to generate QR codes, or whatever that are linked to the user's official identity...
The public part of the identity (which in our example it was enrolled at bank account opening) can be used by the server that checks the QR code to see if it actually belongs to the correct account owner.
The public part of the identity (which in our example it was enrolled at bank account opening) can be used by the server that checks the QR code to see if it actually belongs to the correct account owner.