I wonder if that's because there's an assumption that validation has to occur via the Luhn Algorithm (or Modulus 10)[1] on the input-side? Edit: I'd just let B

I wonder if that's because there's an assumption that validation has to occur via the Luhn Algorithm (or Modulus 10)[1] on the input-side? Edit: I'd just let BankID handle the validation and store the two-digit year.[2] [1] - https://en.wikipedia.org/wiki/Personal_identity_number_(Sweden)#Checksum https://en.wikipedia.org/wiki/Personal_identity_number_(Swed... [2] - https://www.bankid.com/en/ https://www.bankid.com/en/