Georgia has sent out more than 383,400 address confirmation notices to registered voters across metro Atlanta and the state, part of a biennial effort to clean up the state's voting rolls.

The notices are generated after the state compares the list of people who submitted a change of address form to the U.S. Postal Service with the state's overall list of registered voters.

Voters who receive them are asked to fill out the form and return them to their local county elections office. The notice says a voter will be declared "inactive" if they don't respond within 30 days. Several advocacy groups including the ACLU of Georgia, however, say not all voters should face that consequence.

Find out more about the notice, why the state sends it out and how the stakes have been raised this year by clicking here to read our premium story, only on myAJC.com.