A controversial cancer charity will not face prosecution after it voluntarily de-registered as a charity during a probe into its spending.
Internal Affairs launched an investigation into the Cancer Research Charitable Trust after it was revealed to have donated less than 5 per cent of the money it collected from New Zealanders.
But the investigation was closed after the trust voluntarily removed itself from the charities register during the course of the inquiry.
"There was insufficient evidence gathered during the investigation to warrant any officer disqualification or prosecution,'' an Internal Affairs spokesman said.
The Serious Fraud Office also looked into the charity's operations but referred the matter to Internal Affairs.