He said the costs would be paid back if the court action ruled in favour of the liquidator.
The loan would be written off if the litigation was unsuccessful.
If there was any "profit" from a successful court decision, Mr Pettersen said the money would go back to the creditors.
The Nature Green venture involved selling ginkgo trees to growers, some in Hawke's Bay and others in the Nelson/Marlborough region, then buying back the leaves to make into extract.
There was a market for the extract to be used as a medicine but the company went into liquidation in July 2012.
As the liquidator, Mr Petterson took over the remaining assetsof the company, which included an amount of extract from ginkgo leaf.
He was now trying to value the product so it could be sold to the market.
"We are re-testing the extract to tell us how much degradation has occurred but we expect it will be good for another two years.
"We've had some inquiries from parties.
"We anticipate the sale of the product will make a significant contribution to the [court] costs."
Mr Massey, the Napier City Council's economic development manager, said he had not received notice of any court action filed against him.
He said, however, he was looking forward to having a chance in court to prove he had not acted inappropriately as a director of the company.