Voter caging is a tactic that jeopardizes eligible citizens’ ability to vote. The process involves efforts to identify and disenfranchise improperly registered voters solely on the basis of an undeliverable mailing. The most common method involves three steps:4  send mail to addresses on the voter rolls  compile a list of the mail that is returned undelivered, an  use that list to purge or challenge voters’ registrations on the grounds that the voters on the list do not legally reside at their registered addresses.