Hull begin High Court case against Duffen
The club, who also allege Duffen's company received payments from agents in return for using those agents to deal with transfers, announced they had been successful in freezing his assets, the Press Association reported.
"The company believes that Mr Duffen has acted in breach of his employment contracts and fiduciary duties as a director, through the use of company monies for his own personal expenditure and other wrongdoings," the club said in a statement.
"The company also believes that he has acted in breach of his employment contracts and fiduciary duties as a director, through the payment of certain monies by third party football agents to Mr Duffen's services company, in return for which Mr Duffen procured that Hull City contract with the agents for business."
Duffen's barrister, Lexa Hilliard QC, told the court that although he had consented to the orders "this was not to be taken as an admission by my client of any of the allegations against him."
Duffen also agreed to hand over computer files.
A date for the trial was not been fixed.