Immigration New Zealand has started investigating 23 private training establishments in Auckland that enrolled more than 230 students from China who arrived on fraudulent visas.
At least two of the schools are believed to have problems with "non-attendance, non-enrolment and poor documentation", the agency said yesterday.
Immigration NZ head Steve Stuart said: "In cases where providers are not meeting immigration or education requirements, Immigration works with the New Zealand Qualifications Authority and can suspend visas."
An audit of 1800 student visa applications lodged in Beijing found 279 contained fake academic qualifications and falsified statements; 231 students are in New Zealand on these visas.
Several of the 36 students who have been tracked down by the agency were found to be working in a Blenheim vineyard and two others in Christchurch when they were meant to be attending English classes in Auckland.