As a beneficiary, Richmond has tried to have a say in where the assets are invested, to see timelines for the settlement of the estate, and has also tried to extract funds for his disabled sister's care.
When the Guardian Trust ignored his requests for information, Richmond took it to court, and the trust hired a Queen's Counsel in defence.
Richmond would like to see the establishment of an intermediary - such as an Ombudsman to protect the beneficiaries of trusts.
"We can only assume that the financial difficulties in the Guardian Trust extend beyond their mortgage fund and that both our estate and trust monies are now being used in some way for the Guardian Trust's own purposes," he said.
Privacy issues prevent the Guardian Trust from talking to the media about individual investors or trust beneficiaries.
But it said the Guardian Mortgage Fund has been built up since 1986 through the "normal course" of the trust's business operations and it holds $249 million from 3700 investors.
A spokesman said the mortgage fund only invests in first mortgages where advances are restricted to a maximum 60 per cent of valuations across the commercial, retail, industrial, farming and residential sectors.