The public is highly polarised about whether the "tea cup tape" should be released, a poll suggests.
Prime Minister John Key and Act Party candidate John Banks have both refused to give authorisation to release the tape, containing a conversation between the two which they thought was private.
A nationwide HorizonPoll found that 53 per cent of people do not believe the politicians should authorise the public release of the recording, while 46.9 per cent think they should.
The poll also shows that 54.9 per cent of people believe the recording was a deliberate ploy by the media, while 15.9 per cent believe it was inadvertent, 29.2 per cent are not sure.
Asked if the Herald on Sunday, which has the recording but decided not to publish, or other news media should publish it now, 49.4 per cent said no, 39.5 per cent yes and 11 per cent said they are not sure.