Rangers: Secret recording aired
25 October 2012 Last updated at 10:57 BST
The BBC has obtained new evidence which plunges the Rangers administrators into fresh controversy.
A secret recording of a conversation shows Duff and Phelps knew Craig Whyte had sold season tickets to buy the club.
A Duff and Phelps spokesman said the words were taken "out of context".
BBC Scotland's investigations correspondent Mark Daly's exclusive report contains flash photography.