Voters are purged from the Voter Registration roles when they do not vote in 8 to 10 years.
Motor Voter (National Voter Registration Act of 1993) (NVRA) requires voter rolls be properly maintained.
One of the actions necessary to maintain the database is a biannual process.
Every two years all election commissions in the United States are required to purge voter records.
The last purge Shelby County was completed in April of 2014 in compliance with election laws.
Why Purge Voters and How does it work?