Tauranga residents can vote for their new member of parliament from today.
Electoral Commission national manager of voting services Graeme Astle said: "You don't need to wait until election day to vote."
Voting in the byelection closes at 7pm on election day, which is Saturday, June 18.
"Look out for your EasyVote pack in the mail," said Astle.
"The pack includes your EasyVote card which makes voting faster. It also includes a list of voting places and opening hours."