A federal judge is criticizing Wisconsin for not telling people clearly how they can obtain voting credentials if they lack documents to obtain photo ID.

Liberal advocacy group One Wisconsin Institute wants District Judge James Peterson to block Wisconsin's voter ID law. The group's lawsuit follows media reports that show Division of Motor Vehicles workers giving inaccurate information to people without proper ID who need a receipt that allows them to vote without it.

Peterson began a hearing Wednesday by saying the state has fallen short of its obligations to administer the credentials and the chances of getting misinformation is very high.

Peterson questioned whether he has the authority to block the voter ID law, though, noting the 7th U.S. Circuit Court of Appeals has upheld the law.