In the statement, the club said it believed there had been “unacceptable and unauthorised spending” by Rugby Australia, including during the 2023 Rugby World Cup.
The Rebels claim Rugby Australia executives and directors continued to reassure it, and other teams, that a large private equity deal would provide a financial lifeline to the sport.
“Rugby Australia did secure an A$80 million loan facility, but they chose only to provide funding, indemnities or other financial support to the NSW Waratahs and subsequently the ACT Brumbies in preference to the Melbourne Rebels,” the club said.
The Rebels were axed by Rugby Australia in May after entering voluntary administration five months earlier with debts exceeding A$23 million.
Many players and staff have since joined other clubs.
Rugby Australia has been contacted for comment.