That’s how we do our union voting at my work also for our bargaining agreement.
A small yes or no card and a small envelope inside and envelope with you name
On the back.
Then the small envelope is taken out with no name on it and put into the box and
counted later.
But I can see if there was a mishap and a deadline and want to get the votes in
other forms agreed on might have to do as long as it’s done legitimately ?