States are required by the National Voter Registration Act to maintain accurate voter rolls — removing voters who have died, moved out of state, or otherwise become ineligible. They are also prohibited from removing voters solely for not voting. The practical implementation varies enormously: some states purge cautiously and reinstate easily, others run aggressive cross-state matches and remove voters who miss multiple elections.
Supporters of robust roll maintenance argue that outdated rolls — full of dead voters, duplicate registrations, and voters who have moved — invite fraud, waste election-administration resources, and undermine public confidence. They point to bloated rolls in some jurisdictions as evidence that maintenance has lapsed.
Critics argue that purge processes — especially those triggered by inactivity, address-matching, or interstate database checks — disproportionately remove eligible voters, particularly renters, military families, and voters with common names. They point to documented cases of large erroneous purges and to the chilling effect of having to re-register at the polling place.