The Electoral Commission is under fire as it faces counting errors and now questions over voting booth locations.
Investigations are underway after complaints about the commission placing a voting booth at Manurewa Marae, where Te Pati Māori candidate Takutai Moana Natasha Kemp is the chief executive.
Kemp edged out Labour MP Peeni Henare by just four votes in the Tāmaki Makaurau electorate.
But chief electoral officer Karl Le Quesne said people can rest assured it was a fair vote.
"We try to provide a range of voting opportunities for people where they live and work, and that includes in marae and we do a careful assessment," Le Quesne told AM on Friday. "We did a good assessment of that voting place and, as I said, we do need to provide voting places where people live and work, and it was a very popular voting place - so we did make sure we did that assessment."
He told host Ryan Bridge the Electoral Commission sought assurances from Manurewa Marae Kemp wouldn't be involved once it became aware she was the chief executive.
"We had some concerns raised, when voting started, about offers of food," Le Quesne added. "We went and checked those and we were satisfied that wasn't linked to voting at all."
He said, however, more concerns and complaints had since been received.
"We're looking into those at the moment," Le Quesne told AM.
"They're generally about the activities and the food that was offered and, while we're looking into those [complaints], it's not really appropriate for us to talk further about that."
He said he had "no concerns" about the votes cast at Manurewa Marae.
The commission was already under fire after revelations on Thursday more than 700 votes were missed from the final count due to data entry errors in 15 voting places.
That came after admissions earlier this week hundreds of votes had been allocated to different parties incorrectly.
However, Le Quesne said he was confident the commission had fixed the mistakes and "provided that last quality assurance... that makes sure we've entered the data correctly".
Asked how a whole box of votes went uncounted on the East Coast, he said that was "incredibly disappointing".
"We've got processes to make sure all those boxes are accounted for and I want to assure people that [the] ballot box was stored securely along with the others.
"We are getting an independent review done of our quality assurance processes to make sure that we can strengthen those."
