Jackpot City, licensed in Alderney in the Channel Islands, received a notice in November 2023.
20Bet, licensed in Curaçao, was told to stop last month.
The DIA said 22Bet seemed to have wound down its New Zealand advertising after the formal notice and “negative media attention”.
Jackpot City took prompt action to comply with the notice, the DIA said.
“We are currently monitoring 20Bet and Leo Vegas’ responses to our recent notices,” Mark Batt, DIA branch performance director, said.
“The department monitors companies operating in the international grey market on an ongoing basis,“ he added.
The island of Curaçao, a constituent country of the Netherlands, is home to two online gambling sites the DIA has warned. Photo Federico Parra / AFP
Batt said the DIA could take steps beyond issuing formal withdrawal notices.
“Recently, we wrote to all national sporting organisations to remind them of the prohibition on overseas gambling advertising.”
The DIA said that was especially relevant for visiting teams or competitors, who may otherwise have gambling sponsorship on their kits.
“Earlier this year, we issued 12 infringement notices to Spinbet, totalling $60,000, for sponsoring social media posts by New Zealand influencers.”
The DIA has also fined influencers and issued warnings to other users about the penalties for promoting gambling on social media.
Millie Elder-Holmes, Calen Morris, Billy Whaanga and Tuhira Wana received multiple $5000 fines.
Another area of enforcement related to a ban on entities other than the TAB offering sports and racing betting in New Zealand.
The ban took effect at the end of June.
“Since then, we have issued over 20 withdrawal notices to companies suspected of transacting with New Zealand customers, regardless of whether they were advertising directly,” Batt said.
Some influencers, including Māori social media personality Paaka Davis, have rejected approaches from offshore gambling sites.
Online casino licences will be issued for three years under a new regime, due to start in February.
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