I send "fax" via https://epost.de https://epost.de which is incredibly useful public authorities. You upload a PDF and they print it and send it as snailmail.

I send "fax" via https://epost.de https://epost.de which is incredibly useful public authorities. You upload a PDF and they print it and send it as snailmail. Since they verify your identity, it has the legal status of a fax (is my understanding).