No EURion here, apparently
According to the wikipedia article, New Zealand does not use the EURion constellation in its notes but we have similar note technology to the Aussies - polymer notes with "clear" windows (picture inside them), lots of colours and complicated designs.
According to http://www.rbnz.govt.nz/currency/money/polymer.pdf published by the Reserve Bank of NZ, the notes have the following security features:
"1. Each polymer note has two transparent windows. One of the transparent windows is oval-shaped and sloping and has the denomination numerals
embossed in it. The other clear window is in the shape of a curved fern leaf.
2. There is a fern immediately above the clear fern-shaped window. When you hold the note to the light, the fern should match perfectly with another fern
on the other side.
3. You should easily be able to see a shadow image of Her Majesty Queen Elizabeth II when you hold the note to the light.
4. Each note has an individual serial number printed horizontally and vertically.
5. Polymer notes have raised printing, which stands up on the surface and can be felt when you run your fingers over it.
6. Tiny micro-printed letters “RBNZ” should be visible with a magnifying glass.
7. Under an ultraviolet light the polymer note appears dull. Most commercial papers used in forgeries will glow under an ultraviolet light. However, polymer
notes contain special inks, which make particular features glow under an ultraviolet light. For example, the front of each genuine note has a fluorescent
patch showing the denomination numerals, which can only be seen under an ultraviolet light."
And the special "Millennium Edition" of the $10 note had, in addition to all of the above:
"One of the security features on the $10 millennium notes is a special "see-through" window. If you fold the bank note over and look through the clear window at the map of New Zealand next to the canoe, the letters `Y2K' become visible.
Another innovative security feature is the two silver ferns within the clear window, which reflect rainbow colours when you tilt the note to the light."
After all that, EURion constellations would be a bit of overkill.
That, and replacing the two most circulated notes ($1 and $2) with coins, makes it pretty damned hard to forge our currency. (And very easy to blow $20 in "loose change" a week without realising you've done so.)
I'm waiting for the $5 coin to be released when they decide that money is not circulating fast enough and elect to turn another note into "annoying change" to be blown on vending machines. The one- and two-cent coins went the way of the Dodo ages ago and the 5-cent coin has recently followed them, so the time is probably ripe for a 5-dollar coin to be minted under the feeble excuse that "the notes are getting costly to replace" when what they mean is "you're not spending the buggers fast enough, lets make you WANT to get them out of your pocket..."