Police want to hear from anyone who may have been the victim of a man accused of swindling millions of dollars during the past 20 years.
James Lindon Graham, 67, also known as Lin Graham, is facing fraud and money laundering charges in Oamaru District Court.
Detective Sergeant Mike Ryder says Mr Graham was arrested after police received complaints from people who said they gave him money in the hope of a large financial payout.
Mr Ryder says at least 30 complainants have come forward from throughout the South Island of New Zealand and overseas, but believes more people may be affected.
The victims invested significant sums of money and some had handed over their life-savings, he says.
Anyone with information about Mr Graham should contact the Oamaru police station.