Rejected ballots cannot be cured/fixed after 8:00 PM CT on Election Day.
In Nebraska, a mail-in ballot will be rejected if it is not signed. Depending on the county, if you did not sign your ballot, you may be contacted by your county’s election office in order to fix your ballot (prior to 8:00 PM CT). Some counties are required to alert a voter prior to 8:00 PM CT on Election Day that their ballot was rejected, and other counties use their discretion (and will not alert voters). However, if you live in a county that does not allow in-person voting, the county is required to alert you if your ballot is rejected.
If you vote by mail, you can check the status of your ballot online: Nebraska Voter Information Lookup. If your ballot status shows it has been rejected, you should reach out to your county’s Election Commissioner in order to obtain a new ballot. You have a right to receive up to four ballots if a mistake is made when marking your ballots. A mistake could include a pet eating your ballot, a ripped ballot, food or coffee spilled on a ballot, etc.