Hundreds of Hawke's Bay voters have been removed from the electoral roll after failing to update their enrolment details.
Throughout the Napier electorate, 567 voters were removed from the roll after their enrolment packs bounced back marked "gone, no address".
A further 545 were removed from the Tukituki electorate.
Napier registrar of electors Janice Robson said a lot of voters switched cities between Napier and Hastings, thereby moving electorates, or moved overseas.
Throughout the country more than 43,000 voters moved house without updating their enrolment details, and have been removed from the roll.
The Electoral Commission mailed enrolment update packs to everyone on the electoral roll at the end of June, asking them to check their enrolment details.
The Wellington Central electorate had the most voters removed from the roll with 1237, while the Waimakariri electorate had the least with 351.
Enrolment services national manager Murray Wicks said voters who had moved house and not updated their details needed to complete a new enrolment form.
"If you didn't get an enrolment update pack, we don't have your correct enrolment details. You need to enrol now so you can have your say in the September 20 general election," he said.
People can check their enrolment online at www.elections.org.nz, by calling 0800 36 76 56, or by checking the electoral rolls at PostShops and public libraries.
Voters can freetext their name and address to 3676, get a form from a PostShop or call Freephone 0800 36 76 56. People can enrol or update details at elections.org.nz.