A Northland primary school pleaded for Ministry of Education help after it discovered the former principal put seven staff on contracts which were not legally sound.
Documents released to the Northern Advocate under the Official Information Act show Tikipunga Primary School board of trustees chairman Graeme Bratty wrote to the ministry on December 4 last year seeking "urgent assistance".
"We have a number of ongoing issues but the last straw was finding recently the principal [who has since left] had engaged 7 staff on fixed-term agreements, none of which meet the legal test of including genuine reasons or reasonable grounds for being fixed term," Mr Bratty wrote.
Former principal Donna Donnelly, who resigned at the end of Term 2 last year, said she was unable to comment on the intervention and referred questions to Mr Bratty.
Some of those staff claimed they were promised permanency from 2015, he wrote. After the union challenged the validity of the agreements, the board was forced to identify four positions as surplus.