Unicef NZ is warning about a scam using the charity's name to request large sums of money or offer jobs and prizes.
The charity said it had been made aware of a scam in which a caller claiming to be from the Inland Revenue Department tells people they are entitled to a large sum of money.
When the person calls a Wellington number to claim the cash they are asked to donate to Unicef before the money is released.
Unicef NZ executive director Dennis McKinlay said the calls were a scam, and had been reported to Scamwatch, run by the Ministry of Consumer Affairs.
The charity has also warned about emails claiming to be from Unicef.