Embattled lawyer John Voitin faces bankruptcy and the loss of his family's property portfolio as a disgruntled client pursues him in the Supreme Court over a $3.2 million debt.

The debt allegedly arises from a failed investment in a managed mortgage fund that was arranged at the South Melbourne offices of Mr Voitin's former law firm Stanton Grant Legal.

John Voitin. Credit:Jason South

Detectives from the Echo Taskforce raided Mr Voitin's former business in March 2018 as part of a major investigation into the laundering and concealment of criminal proceeds on behalf of the Comanchero motorcycle gang.

The regulator of Victoria's legal industry seized control of Stanton Grant Legal, which was placed into liquidation in April 2018.