[dingaling]

It's a reasonable question.

You can determine to some extent whether postal votes have been tampered with after they have been cast. Or whether more results were returned than were issued.

But you can never realistically know what happened at the time of casting. Coercion is invisible with postal voting.

[marcosdumay]

Can you determine if some votes have been destroyed?

(I really don't know how that system works.)