[maxheadroom]

>...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

[1] - https://en.wikipedia.org/wiki/Icelandic_identification_numbe...

[2] - https://en.wikipedia.org/wiki/Personal_Public_Service_Number

[kzrdude]

It's not claimed to be unique