[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2008/images/11/04/art.cincy1104.ap.jpg caption="A voter in Cincinnati sits while filling out his ballot because all of the official voting stations were full."]
CINCINNATI, Ohio (CNN) - Some judges at polling precincts in Ohio were issuing provisional ballots in error because they were confused about whether state drivers' licenses with outdated addresses could be used as proof of identification, Hamilton County Board of Elections Director Sally Krisel confirmed Tuesday.
"They are nervous, so they have them vote by provisional ballot," Krisel said of the judges who were not aware of an Ohio law that mandates that drivers' licenses can be used as proof of identification and address, even if the address does not match the voter's current address.
Cuyahoga County Board of Elections Community Outreach coordinator Kim Bartlett says the same thing is occurring in her county.
"If I move, I'm not required to get a new drivers license with a new address, she explained Tuesday. "Licenses are good for four years, even if they don't have a valid address, its still considered valid proof of ID."
Both the Hamilton County and Cuyahoga County Board of Elections say they were engaged in outreach efforts throughout election day to explain the rules on provisional ballots to confused poll workers.
Ohio State University law professor said he had also heard some complaints about voters being forced to use the provisional ballot but it was too early to tell if this was a systematic, statewide problem.