You do not need to print your New Zealand eTA, as it is electronically linked to your passport.
What You Need to Know
New Zealand border officials and airline staff can verify your eTA by scanning your passport, and no separate physical document is issued. While a printed copy is not required, travelers may choose to carry a digital or printed version of their eTA approval email or reference number in case it is requested during check-in or boarding.
Our Recommendation
Carry the passport you used for the eTA application, and keep a digital or printed copy of your approval notice or reference number handy as a backup.
A Quick Tip
Save a copy of your eTA confirmation email to your phone or cloud storage, and consider forwarding it to yourself for quick access during your trip.