There are some point&click games (like Edna & Harvey: The Breakout) that do that.

Where I live you just get a letter some weeks before the election. With that letter you can vote at the place that is named in the letter (or anywhere in the same city). If you lose the letter you can still vote with your id-card, but only at the place that was named in the letter.

Easy, isn’t it?

I will never get why you have to Register at all

Imaging for a moment all non-company-mail-servers would block all company-mail-servers (like gmail). Would that be a good idea?

I’m against the defederation. The internet and the www are based on the idea of connection.