Hundreds of Tauranga voters have been removed from the electoral roll after failing to update their enrolment details.
Across the Tauranga electorate, 634 voters were removed from the roll after their enrolment packs bounced back marked "gone, no address".
A further 563 voters were removed from the Bay of Plenty roll.
Tauranga Electoral Office registrar Lesley Christophers said Tauranga was a growth city and many new residents had moved into the area and not updated their enrolment details.
She said a number of elderly had moved into retirement villages throughout the electorate from other areas of New Zealand.
Other voters had moved across town and had changed from the Tauranga to the Bay of Plenty electorate, she said.
If voters had not received their voting update pack, they were not enrolled.
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 in June, asking voters to check their enrolment details.
The Wellington Central electorate had the most voters removed from the roll with 1237.
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.