The commerce watchdog says it's investigating more than 60 complaints about an online ticket reseller.
The Commerce Commission confirmed on Wednesday the complaints were about ticket reseller Viagogo from New Zealand customers.
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The allegations include that Viagogo led consumers to believe it was not a resale website, that it didn't disclose additional fees, and that some were sold fake tickets.
Earlier on Wednesday, Consumer NZ called for the commission to take action against after its Australian counterpart announced it was prosecuting Viagogo this week.
The Australian Competition and Consumer Commission (ACCC) is prosecuting the reseller, alleging the company has misled consumers.
"The outcome of the ACCC's case may be relevant and the commission will be following the case closely," a Commerce Commission spokesman said.
New research from advocacy group Consumer NZ release on Wednesday said some customers of websites that sell on tickets - such as Viagogo and Ticketmaster Resale - had bought tickets marked-up by more than 500 percent.
More than 1000 consumers took part in the survey about their experiences with ticket resellers.
One fan bought a ticket to a rugby match that was marked up at 700 percent, Consumer said.
Some were sold fake tickets and others bought tickets that never turned up.
"The company's website also pressures consumers to buy, claiming tickets are in high demand and selling fast," Consumer NZ head of research Jessica Wilson said.
Comment has been requested from Viagogo.