Diversified minerals group Admiralty Resources is fighting off legal action from the receivers of Opes Prime, who are seeking the immediate repayment of a $10.8 million loan they claim Opes director Anthony Blumberg agreed to delay just a month before the stockbroker collapsed.

Admiralty director Phillip Thomas has given evidence to the Victorain Supreme court that during a conversation in February this year, Mr Blumberg agreed to extend the date for repayment of the $10.8 million loan for 12 months until September 30 this year.