What happens if your mail ballot is flagged for possible rejection? That depends on where you live in Pennsylvania.

Philadelphia is among the more than half of Pennsylvania counties that notify voters if they submit flawed mail-in ballots and let them correct the errors before polls close, per an ACLU analysis. Why it matters: Thousands of mail-in ballots have been rejected for technical errors since Pennsylvania enacted mail-in voting in 2020.

A Pennsylvania appeals court ruled Wednesday that the state constitution prohibits the disqualification of timely mail ballots because of a missing or improper date. Though the 3-2 majority stressed its decision only concerns 69 rejected votes in a special election last month — which will have no impact on the outcome — it ushers in new uncertainty surrounding