"Basically the typical story is they have to endure humiliating speculation," said Megin McDonell, executive director of Fair Wisconsin, an advocacy group for lesbian, gay, bisexual and transgender people. "People get hung up on the gender expression or gender presentation when poll workers really need to put those preconceived notions aside and make sure their IDs meet the criteria of the law."

Magney said there is not official state guidance for county clerks and poll workers on how to handle situations in which transgender voters and others have identification that doesn't fully match their physical appearance, though questions have been raised by county clerks.

He said the law does not require poll workers to check gender on IDs and requires photos to reasonably resemble the voter.

"The issue would be in terms of the name," said Magney.

He said if a transgender voter has had his or her name changed by a court, those voters would need to re-register to vote, which can be done at polling places on Election Day.

A name doesn't need to match exactly, but "it must be similar" to the voter's name on the poll book, he said, adding that if transgender voters have concerns they should contact the commission or visit myvote.wi.gov.