The process has become especially important this year because of the unprecedented amount of mail-in and absentee ballots, which require signatures or other validation before they can be counted.
But when a signature is missing or doesn’t match the one on file, or there is another issue with how the voter completed the ballot, some states require officials to contact the voter so they can correct the mistake, a process known as “curing.”
Here’s a list of the ballot “curing” deadlines for the key states that allow voters to correct their ballot.