2 added 'national-id-number' tag
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Does a Swedish personal number expire?

I'm a Dutch citizen who has previously lived in Sweden for six years, but I have since moved on. The Swedish version of what is called social security number, social insurance number, government service number, or otherwise, is the personnummer. I got a personnummer assigned shortly after arriving and registering in the country. Does this personnummer remain valid for the rest of my life, or is there some expiry? I know that my Canadian social insurance number will expire. What about my Swedish one?