The Pennsylvania Department of State announced it is joining a multistate consortium to identify voters who may be registered to vote in more than one state.

A statement released by the state department said that, several years ago, election officials in a number of Midwestern states created a plan to cross-check voter registration databases. The program, called the Interstate Voter Registration Crosscheck Program, is now composed of 24 states, including Pennsylvania. Kansas election officials operate the cross-check program at no cost to participating states.

The department said the program in 2012 discovered more than 5 million potential duplicate registrations.

“We are a mobile society in the United States, and it is important that election officials use available tools to make sure only legally registered individuals vote, and cast only one ballot on Election Day,” Secretary of the Commonwealth Carol Aichele said in a statement. “I believe this program can help us remove from Pennsylvania’s voter rolls people who have moved to other states and registered to vote there. This will improve the integrity of our voter lists, protect the legally cast ballots by our citizens and further bolster public confidence in our electoral process.”

In addition to Pennsylvania, other states in the program include Alaska, Arizona, Arkansas, Colorado, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Michigan, Mississippi, Missouri, Nebraska, Ohio, Oklahoma, Oregon, South Carolina, South Dakota, Tennessee and Virginia.