[moksly]

We don’t have an issue using it in Denmark. You’re registered to a address and a place to cast your vote. Every election everyone gets a voting card (is this a ballot?) by mail. If you somehow don’t receive it, lose it or happen to be homeless, you can go to your voting place and have them print a new one for you that you can then use to vote.

It does require some sort of system to register citizens of course. But almost all our public IT does that and we’ve had it since before IT became a thing. Which is easier in a small country, but there is no reason it couldn’t scale.