If you haven't received an enrolment update pack, you're not enrolled to vote in the general election.
This week, about three million New Zealanders were posted enrolment update packs.
But if you did not get one, it means the Electoral Commission has lost track of where you live.
"Many people do not receive their packs because they've moved house and not updated their enrolment details. If their pack gets returned to us then we have to remove these people from the electoral roll," said Murray Wicks, national manager, Enrolment Services.
"Enrolling to vote doesn't happen automatically once you turn 18 or become eligible. You do need to fill in an enrolment form," said Mr Wicks.