This kind of vote fraud is impossible in Germany. You don't have to register to vote because everybody is registered. If you're eligible to vote (18 or above, german citizen) they send you a card and tell you at which place you have to vote. with this card + your id card you can vote then.
"card + your id card you can vote "
you mean that showing an id at the voting place is not considered voter intimidation? ;)
Seriously, sounds like a sensible safeguard
Thanks for your answer.