My husband reminded me that ballots that are POSTMARKED on election day but returned to City Hall within the next 4 days are counted last, unless the margin between candidates is so wide that they wouldn’t make a difference. Then, they are not counted at all.
But, I don’t think the postmark really counts since our city pre-stamps them when they are sent out. So they must just accept anything that comes in within 4 days of the election.
The city puts a stamp on them they do not postmark them. Only the post office can do that.