Drop boxes are a safe and secure way for Pennsylvania voters to return their voted mail-in or absentee ballots. Voters may return their mail-in or absentee ballot at their county election board's designated drop box(es) or dropoff location before 8 p.m. on election day, Tuesday, November 3, 2020.

https://www.votespa.com/Voting-in-PA/Pages/Return-Ballot.aspx

Your ballot must be received by Tuesday, November 3, 2020 by 8:00 p.m. You can find ballot tracking information here. We encourage you to return your ballot as early as possible.

https://howto.vote/vote/en/wi.html

Т.е., чтобы сделать то, что я сказал надо таки получить бюллетень после 8ми.
Если это так то доказать должно быть не сложно