The Pennsylvania Voter Registration system does not allow more than one ballot to be issued to a voter.
Once a ballot is received by Voter Services in Norristown, the record of the voter who returned the ballot is updated to indicate they have returned their Absentee or Mail-in ballot. Voter Services can only record the receipt of one ballot per voter.
If the voter has provided their email address, they receive an email indicating that their ballot has been received and they cannot vote at the polls.
Each polling location receives a listing of all voters who have either applied to vote by mail or who have returned a ballot prior to Election Day. A poll worker must not issue an in person ballot to a voter who has already returned their Absentee or Mail-in ballot.
A poll worker may only issue a ballot to a voter who applied for an Absentee or Mail-in ballot if they surrender their Absentee or Mail-in balloting materials & sign a document affirming that they did not cast a ballot in any other manner and are entitled to vote at their polling location. If the poll book indicates that a voter applied for or returned their Absentee or Mail-in ballot and the voter still wishes to cast a vote at the polls, the Judge of Elections may issue them a provisional ballot to fill out at their polling place.