The Madison City Clerk said Tuesday 300 voters have called saying they did not receive their mailed absentee ballots, following confusion with a mailing last month.

News 3 first reported that the Clerk's Office mailed more than 1,700 ballots on Sept. 22 from the now-closed Madison Municipal Building Post Office branch. Some of those ballots were never received, and Postal Service officials said an investigation is underway into what may have happened to them.

Madison Clerk Maribeth Witzel-Behl told News 3 they have mailed 300 voters new absentee ballots. When that happens, the prior ballot is invalidated in the city's computer system so multiple ballots cannot be cast.

Any voters who have requested an absentee ballot from the city and have not received them should contact the Clerk's Office to have one mailed to them.

Witzel-Behl said they have heard no further information from the Postal Service on what may have happened to the original ballots.