Waiariki's interim chief executive Neil Barns said the institute was working closely with Immigration New Zealand to "help improve this situation through information sharing which to date has successfully uncovered fraudulent practice of using fake documentation".
"We also have a very robust agent training and approval process and actively work with Immigration New Zealand and our agents aiming to get higher quality applications and identify the agents who are fraudulent."
Mr Barns said the institute had not appointed any new agents in "high risk" regions Punjab, Andhra and Pradesh following discussions with Immigration New Zealand.
Meanwhile, Waiariki remains a favourite with international students with new figures from the New Zealand International Education Snapshot showing enrolments were up 22 per cent, or 891 students in the Bay of Plenty area last year.
Waiariki's international education director Graeme Rennie said the school expected about a 20 per cent increase in international students overall this year, including about a 12 per cent increase at its Mokoia campus.
Most students were from India, China and South East Asia, similar to at the vast majority of tertiary education providers.
Mr Rennie said the students were studying a wide range of programmes from certificate and diploma up to post graduate diplomas.
There were even a few studying at masters level, he said.
Management, applied technology, and health related programmes were the most popular for international students.
The English language was also popular with local migrants studying it as well as international students.
The New Zealand international education industry earned just over $1 billion in tuition fee revenue in 2015, an additional $146 million compared to 2014, and a record result for the industry.
- Additional reporting by Kim Fulton