In a judgment today, Justice Pheroze Jagose sided with the Commission.
"The Commission has carefully considered the decision and we have decided to appeal it because of the ongoing harm that we believe New Zealanders are being caused by Viagogo's marketing. The number of complaints we are receiving about it is unprecedented, with nearly 950 now received," Commission chairman Dr Mark Berry said in a statement.
Viagogo has previously declined to accept service of the court proceedings in New Zealand. In a hearing in February, the ComCom said going through diplomatic channels, as requested by Viagogo, would delay proceedings by around six months.
The company has faced hundreds of complaints from Kiwis over its selling practices and commission alleges it has made false representations to its customers.
At the February hearing, Viagogo said it had made changes to its website and sales process that addressed the Commission's concerns - which its lawyer argued were in any case below the threshold of a Fair Trading Act breach.
But in March, there was further controversy as About 200 concertgoers were refused entry to the Six60 concert at Forsyth Barr Stadium on Saturday night when they tried to enter with "fraudulent tickets".
Eccles Entertainment promoter Dave Munro believed the vast majority of the fake tickets presented at the gates were obtained from Viagogo.