If you returned your mail (absentee) ballot to the Supervisor of Elections, but forgot to sign the ballot, your ballot will not count unless you complete and return the Omitted Signature Affidavit for Absentee Ballot (DS-DE 139, effective 1/2014) no later than 5:00 p.m. on the day before the election. Please follow the instructions on the form carefully, as failure to do so may cause your ballot not to count.