Officials in Ohio said that about 50,000 voters in Franklin County received incorrect absentee ballots in the mail.
"We can now confirm that 49,669 voters received an incorrect ballot. Those voters will be contacted directly by the Franklin County Board of Elections and a replacement ballot will be mailed to them," said the Franklin County Board of Elections.
"We want to make it clear that every voter who received an inaccurate ballot will receive a corrected ballot," the board said. "Stringent tracking measures are in place to guarantee that a voter can only cast one vote."
It came after New York City recently was forced to mail 100,000 absentee ballots after a printing error was reported.
Ohio Secretary of State Frank LaRose's office has directed the board to write a letter that explains the error along with the replacements.
Leonard said that if a voter sends both the replacement ballot and the original, erroneous ballot then the replacement will be the one that is counted. If a voter sends only the original ballot, only their votes on races that they were eligible to vote in will be counted.
“While this process has taken longer than we’d like, we aren’t just determining a number. We’re determining and identifying each impacted voter," Leonard said in a news conference on Thursday.
Leonard blamed a malfunction with one of the scanners used to process the ballots.
Over the past several months, President Donald Trump has frequently highlighted errors in the vote-by-mail system, urging people to go to the polls to vote, while adding that it could lead to election chaos or even rigging.