The High Court in Belfast has heard that Sean Quinn has moved his centre of main business interests to an industrial estate in Derrylin, Co Fermanagh.
The centre of main interests is the key point in Irish Bank Resolution Corporation's attempt to annul Mr Quinn's bankruptcy.
The former Anglo Irish Bank claims Mr. Quinn's main interests are in the Republic which invalidates the bankruptcy move in the North.
However the businessman insists his main interests are in Co Fermanagh.