Police are warning Kiwis using cash to make sure what they're being given isn't counterfeit.
Fake banknotes were recently presented at a number of businesses in south Taranaki, police said on Saturday.
They're investigating the source.
"It's important for people to understand it is both an offence to make, use or be in possession of counterfeit banknotes," a spokesperson said.
"If you believe someone is trying to pass you a counterfeit banknote, do not accept it and notify police."
New Zealand banknotes all contain sophisticated security features. They're made of polymer, not paper, have raised printing and unique serial numbers, holographic features and hidden writing only visible with a magnifying glass, for example. They also can't be torn easily.
More ways to spot the difference between real and fake banknotes can be found on the Reserve Bank's website.
"If you find you’ve already received a counterfeit banknote, put it in an envelope to avoid handling it further, and get in touch with police."
Police said call them on 105 or Crime Stoppers on 0800 555 111 to report counterfeit money.
Last month, a fast-spreading "urban myth" had Christchurch residents accusing each other of using counterfeit money and illegally damaging banknotes.
"People are being told that you can tell a fake banknote by scraping it with a coin, and if the printing comes off revealing the plastic then it's a fake," Reserve Bank spokesperson Peter Northcote said.
"This is completely false, not one of our recommended ways to check a banknote, and actually illegal defacement."
Earlier in 2021 fake money was circulating in the Manawatū region.
