What a strange idea for someone from Germany. Here you are registered as a citizen and get a letter to your registered address and you take that to the voting station. Vote. Done.
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In case that was sarcasm, then I have to disagree. The current German state has an excellent track record when it comes to voter enfranchisement. Its shortcomings with the democratic process lay elsewhere. The last really questionable action relating to elections was the questionable ban of the communist party - in 1956.
"Current state" is a convenient wording to exclude 1933-1990
Personally don't think the German Democratic Republic had an excellent track with enfranchisement.