Court official Chris Lehane in charge of administering the estate of bankrupt Priory Hall developer Thomas McFeely has begun a High Court bid to extend the bankruptcy by five years.
Mr Lehane is seeking the extension on grounds including an alleged failure by Mr McFeely to disclose all his assets.
Mr McFeely, 67, was adjudicated bankrupt in Ireland in July 2012.
That bankruptcy is due to expire shortly.
He had previously been adjudicated a bankrupt in England and Wales but that decision was reversed after a woman to whom his companies owed €100,000 took legal action.
Senior Counsel, Bernard Dunleavy for Mr Lehane, said Mr Lehane was seeking a five year extension of Mr McFeely's bankruptcy, over Mr McFeely's non co-operation with the bankruptcy and his failure to disclose assets.
He told the court that Mr McFeely is believed to be in Northern Ireland and had provided a contact address at Claudy in County Derry - believed to be his parents' former home, but he was not living there.
Ms Justice Caroline Costello was told Mr Lehane was seeking various orders allowing him to serve notice of the extension proceedings on Mr McFeely at the address in Claudy and via email addresses and his solicitors' addresses.
The judge was told the matter was urgent because the bankruptcy was due to expire soon and Mr Lehane was unsure of the exact whereabouts of Mr McFeely.
The judge said she was satisfied it was appropriate to make orders permitting the proceedings be served in most, but not all, of the forms sought by Mr Lehane.
The High Court noted in 2012, that Mr McFeely had substantial debts here, including €200m in NAMA.
