The US even tries to make its overseas nationals pay tax. As a result, everyone everywhere in the world who wants to get paid by Amazon has to sign a US tax form saying they're not a US taxpayer.
The answer is goodwill and doing the right thing.
Spent the last few months trying to explain to a randomly changing E.ON representative how unacceptable it was for them to send bills with my name on it to a non-existent address.
I moved out of the country in 2018.
They've offered me £10 credit. That I can't use, because I left the country.
I need to gather all the emails together and send them to the ombudsman, but there's around 80 emails now.
I mean, I guess you could do something with the DKIM signature, but good luck getting non-technical people to forward a mail in a way which leaves that intact. Realistically the best you're getting is a butchered screenshot.
The UK treats "utility bills" as proof of address. Yes, these are trivially forgeable and often incorrect. Yes, it's a big pain that you don't exist if you're not paying bills.