"At this stage we need to understand exactly what's going on with regard to the jerseys available for sale on this website," she said. "Adidas NZ has engaged our brand protection team, who is investigating this issue on our behalf."
Counterfeiting was an issue faced by many desirable brands around the world, she said.
"Adidas maintains a very high standard of control and quality throughout our production and supply chain, so New Zealand customers can rest assured that any products they purchase through reputable retailers here in New Zealand are the genuine article."
An investigation into the sales of the jerseys on AliExpress was likely to take some time, she said.
"In the meantime, we strongly recommend that fans purchase their Super Rugby merchandise from retailers they know and trust or from adidas.co.nz."
