What does "registration" mean?
In my country, I take my old document of national identity and I'm golden.
It's not really compulsory. The law is there, but it's rarely ever enforced, and even if it was, the fine for not voting is so ridiculously small it's better than to wait 3 hours in the voting queue.
But trying to make a correlation between these countries' fuck ups with something as minimal as their compulsory voting shows how much you don't know.