I’m sorry, I’m hung up on you saying election officials would track down the voter to confirm their intent. And you mentioned you volunteered or worked in elections possibly in not-the-US. In the US (or at least in my state) ballots are anonymous. That was why such a fuss was made in 2000 over trying to determine what the voter intended if a ballot had a “hanging chad”. They couldn’t just track down the person to confirm, and the margins were close enough to call a recount but not for a do-over. It was election purgatory.