>...it's very convenient when you're in the system and impractical when you are not. This exists everywhere, though, so Sweden's personnummer isn't exactly uni

>...it's very convenient when you're in the system and impractical when you are not. This exists everywhere, though, so Sweden's personnummer isn't exactly unique in this case. For a small subset of examples, take Norway's fødselsnummer[0] or Iceland's identification numbers[1] or Ireland's PPS number[2]. [0] - https://no.wikipedia.org/wiki/F%C3%B8dselsnummer https://no.wikipedia.org/wiki/F%C3%B8dselsnummer [1] - https://en.wikipedia.org/wiki/Icelandic_identification_number https://en.wikipedia.org/wiki/Icelandic_identification_numbe... [2] - https://en.wikipedia.org/wiki/Personal_Public_Service_Number https://en.wikipedia.org/wiki/Personal_Public_Service_Number