Businessman Sean Dunne is appealing a decision of the High Court refusing him permission to cross-examine a court-appointed official in a hearing aimed at extending his period of bankruptcy.

Mr Dunne, who was adjudicated bankrupt in Ireland in July 2013, was due to exit bankruptcy in July 2016.

However, official assignee Chris Lehane has applied to extend it by five years amid allegations of non-cooperation and hiding assets.

Mr Dunne opposes any extension and the High Court was previously told it is of "paramount importance" to him to "get free of the shackles of bankruptcy".

Mr Dunne appealed to the Court of Appeal against the High Court's refusal last February to permit cross-examination of Mr Lehane in the extension hearing.

The High Court judge was unable to identify relevant conflicts in affidavits of Mr Dunne and Mr Lehane to make cross-examination of Mr Lehane necessary to justly decide the extension application.

In his appeal, Bill Shipsey SC, for Mr Dunne, argued the developer is entitled under rules governing bankruptcy to cross-examine Mr Lehane about the basis for his application.

The High Court also has discretion to direct cross-examination, he said.

There was no basis for extending the bankruptcy and a number of affidavits from Mr Dunne showed "manifest contests" concerning Mr Lehane's allegations.

The fact Mr Lehane had been provided with relevant documents and materials via the US trustee administering Mr Dunne's bankruptcy was also an example of his client's co-operation, he added.

Mark Sanfey SC, for Mr Lehane, argued Mr Dunne had failed in his affidavits to show a serious dispute on the facts on which Mr Lehane based his belief underlining the extension application and there was no basis for cross-examination.

An example of non-cooperation was Mr Dunne had given Mr Lehane his address as a property in Connecticut which is "unoccupied and unfurnished", counsel said. 

Mr Dunne was also not entitled to "thumb his nose" at Mr Lehane by asserting cooperation with his US trustee was sufficient to establish cooperation in his Irish bankruptcy.

The High Court had found affidavits from Mr Dunne had not contested most of the facts concerning his engagement with Mr Lehane and the most recent affidavit from Mr Dunne did not change the position, he argued.

Ulster Bank had petitioned the High Court in February 2013 to have Mr Dunne adjudicated bankrupt in Ireland over default on €164m loans.

The following month, Mr Dunne filed for bankruptcy in Connecticut, US, when he claimed to have debts of $1bn and assets of $55m.

In July 2013, he was adjudicated bankrupt here.

In seeking to cross-examine Mr Lehane, Mr Dunne said the latter had made specific allegations concerning the Lagoon beach hotel in South Africa; "Walford", Shrewsbury Road, Ballsbridge, and a property at Churchfields, the K Club, Straffan, Co Kildare. 

Mr Lehane disputes the validity of transfers of those properties by Mr Dunne, has obtained freezing orders concerning the Lagoon Beach hotel and has also taken proceedings against Gayle Dunne and John Dunne, a son of Sean Dunne.

The Court of Appeal will give judgment at a later date.