How long has it been since you needed to mail a physical document to a bank, a government department, or something similar?

I live in Sweden, and I can confidently say... Once.

As in, literally as long as I've lived here (11 years now) I mailed one thing by post and it was, somewhat ironically, a self-assessment form for an ADHD diagnosis from a company called Modigo.

I have received a lot of mail though, from the government also, so I'm not sure how that is gonna fly.

I mailed in my taxes last April, as I always have.

I mail documents frequently, but not letters.