Mark Hotchin has lost an appeal over a decision which said Hanover's trustees did not have a duty to verify the accuracy of statements in allegedly misleading prospectuses.
Hotchin and five others associated with Hanover companies are being sued by the Financial Markets Authority for allegedly misleading or untrue statements in finance company prospectuses.
The case is due to go to trial in July next year and is expected to take up 12 weeks in the High Court at Auckland.
The FMA is seeking compensation for investors who put $35 million into Hanover Finance, Hanover Capital and United Finance between December 2007 and July 22, 2008. Hotchin last year attempted to join two trustee companies - New Zealand Guardian Trust Company and Perpetual Trust - into the FMA's civil case against him.
Hotchin argued the trustees held a duty of care to investors and that they should contribute to any damages payable if the FMA's case succeeds. But the trustees fought the attempt and last year the Chief High Court Judge Helen Winkelmann struck out Hotchin's application to join them in the civil action.