Ohio Revised Code Title XXXV. Elections § 3511.11

(A) Uniformed services or overseas absent voter's ballots delivered to the office of the board of elections not later than the close of the polls on election day shall be processed and counted in the manner provided in section 3509.06 of the Revised Code.

(B) A return envelope is not required to be postmarked in order for a uniformed services or overseas absent voter's ballot contained in it to be valid.  Except as otherwise provided in this division, whether or not the return envelope containing the ballot is postmarked, contains a late postmark, or contains an illegible postmark, a uniformed services or overseas absent voter's ballot that is received by mail after the close of the polls on election day through the fourth day after the election day shall be processed and counted on the fifth day after the election day at the office of the board of elections in the manner provided in section 3509.06 of the Revised Code if the voter signed the identification envelope by the close of the polls on election day.  However, if a return envelope containing a uniformed services or overseas absent voter's ballot is so received, but the identification envelope in it is signed after the close of the polls on election day, the uniformed services or overseas absent voter's ballot shall not be counted.

(C) The following types of uniformed services or overseas absent voter's ballots shall not be counted: