Kiwis who want to have their say on whether or not New Zealand should change its flag are being urged to get their voting papers into a post box as soon as they can.
Voting in the second binding referendum doesn't close until 7pm on Thursday, but the Electoral Commission says people should get their papers in the mail on Monday to make sure they're in on time.
Voters who don't make the Monday deadline should take their papers to a Post Shop post box.
Close to 1.8 million voters have already had their say, according to the latest statistics published by the Electoral Commission.
The preliminary referendum result is expected to be announced about 8:30pm on Thursday.
The official result will be announced on March 30.