A donor register is being considered to help lift New Zealand's low rate of organ donation - but would need to be part of other new measures.
Health Minister Jonathan Coleman asked for advice on such a step, and received a report from the Ministry of Health in March. He has now asked for more information, but said a register, on its own, was unlikely to have enough impact.
At present, if New Zealanders want to be a donor, it can be stated on a driver's licence.
Other countries including Australia have donor names in a database, which can help families to approve donation if the person arrives in hospital with a non-survivable condition. Some registers let people state which organs they wish to donate.
New Zealand has one of the lowest organ donation rates in the developed world, with only 46 viable deceased donors last year.