The conwoman investment broker disappeared in November 2020, hours after the Australian Federal Police and Australian Securities and Investments Commission raided her Dover Heights home.

Three months later the 49-year-old's decomposing foot, encased in a running shoe, washed up on a south coast beach.

She is believed to have used her company Maliver to conduct a Ponzi scheme, stealing around $23 million from friends and family to fund her luxurious lifestyle and was facing a string of charges.

Police have stated they believe Caddick is dead, but conspiracies that she is alive - living somewhere without one of her feet - have abounded.

The theories will be tested at a two-week inquest into her disappearance, due to begin on September 12.

The announcement comes as her parents - who also say they were swindled - seek to stop liquidators and receivers taking the apartment they live in.

Liquidators and receivers moved to take possession of the properties in November after getting the sign-off of the Federal Court.

But in a statement tendered to the court last week, Barbara and Ted Grimley argue they should be allowed to retain the Edgecliff property, purchased in 2017 for $2.55 million.

The Grimleys originally lived in Sydney's south, but were convinced by their daughter to sell their home and move east to be closer to her family.

They contributed almost $1.2 million to the purchase of the apartment, bought in Caddick's name, on the condition they would have the right to live there rent-free until they died.

But without their knowledge, Caddick "dishonestly and fraudulently" did not use the money to pay down the loan taken out of the Edgecliff property, the statement says.

Australian Associated Press