A group of 20 Asian gamblers who left without paying debts of $2.4 million are getting some of the blame for a drop in SkyCity's profits.
It is thought the group has also ripped off other casinos.
Nigel Morrison, SkyCity chief executive told a briefing this morning the group had been active at other casinos but none that SkyCity owned.
"These guys have also done this at other properties. It's a fact of doing business in this space," he said.
SkyCity has upped criminal surveillance after being scammed, hiring a top casino crime-buster, Morrison said.