The Commerce Commission is suing online ticketing platform Viagogo for breaching the fair trading act.
Viagogo has been under attack recently for allegedly misleading consumers.
Crusaders fan Abby Dickinson is one consumer who says she was ripped off using the site
Dickinson bought a ticket on Viagogo to the Super Rugby semi-final between the Crusaders and the hurricanes on July 28.
When she arrived at AMI Stadium for the game, she was turned away at the gate.
Dickinson was not surprised Viagogo is being taken to court, saying she knew plenty of people who had been scammed on the platform.