Join Date: Sep 2014
Location: South Island, New Zealand
Programs: Krisflyer, Qantas Frequent Flyer, Air NZ Airpoints, Koru, NZ*S and former *G
Posts: 321
I see the following now on website .... credits can be used for any travel, which is more palatable than previously suggested options.
Managing your flights with Air New Zealand
If you booked through a travel agent, please ask them to manage your changes.
Sorry, we can't give you a refund on a non-refundable ticket.
Arrange a 12-month credit for your booked ticket for travel before 30 June - it's online and fast
You can use your credit within the next 12 months for any travel on Air New Zealand.