The uncertainty as to who held what assets was seen a risk for terminating Allan Hubbard's statutory management, as was the claim that there were "misleading representations to investors," the report said.
"The administration of the statutory management of the other entities without the inclusion of Mr and Mrs Hubbard would be counterproductive to resolution given the high degree of intermingling of Mr Hubbard's affairs with the affairs of the other entities in statutory management," Anderson and Pardington said.
The statutory managers also considered there was a possibility Hubbard's liabilities would exceed his assets once the dispute reached the court-room, the report said.
Anderson and Pardington saw fewer risks to lifting the order on Jean Hubbard, Allan's wife and the executor of his estate, saying her statutory management could be removed earlier once certain matters were addressed.
The government seized control of the Hubbards's affairs in June 2010, controversially leaving out South Canterbury Finance, after an anonymous complaint was laid by an investor claiming they hadn't seen a prospectus for their investment in Aorangi Securities.
Trevor Thornton, Richard Simpson and Graeme McGlinn of Grant Thornton were appointed the statutory managers of the Hubbards, Aorangi Securities and several charitable trusts.
During the course of the administration the statutory managers found an investment had been transferred into Southbury, even though Allan Hubbard had told an investor it was in Aorangi Securities, the report said.
They also uncovered the existence of the Hubbard Managed Funds business, which had operated without clear instructions or authorities and was unknown to investigators before the statutory management order, as well as assets and liabilities that were omitted from the Hubbards' statement of financial position.
The report was commissioned by Companies Registrar Neville Harris in 2011, and Allan Hubbard died while it was being considered. Harris subsequently sought more advice, leading to his recommendation to then-Commerce Minister Simon Power to lift the order over Jean Hubbard.
The statutory managers are now locked in High Court battle with Jean Hubbard over $60 million of assets she denies were transferred to Aorangi Securities, the cost of which is being picked up by investors in the frozen firm. A hearing has been set down for May this year.