Dunnes Stores must pay €15.5m immediately to the receivers of a company of businessman, Harry Crosbie, the High Court has ruled.
The court ruled Dunnes must make the payment to comply with the agreed terms of settlement of a dispute about the planned Point Village Development.
The receivers claimed the money was due under a settlement between Dunnes and Point Village Development Limited (PVD) negotiated by the PVD chairman Harry Crosbie in 2010, before the National Asset Management Agency appointed joint receivers over the company three years later.
PVD had claimed Dunnes failed to honour a 2008 agreement to become the anchor tenant in the centre.
Dunnes denied the claims and alleged PVD had not complied with some of its obligations.
The case settled in 2010 but further disputes arose.
In her ruling, Ms Justice Caroline Costello upheld PVD's claims that it had met its obligations under the settlement agreement.
She found Dunnes was obliged to release €15.5m to Point Village "forthwith", plus accrued interest.
The Point Village development is situated on Dublin's North Wall Quay and includes a cinema, offices, a hotel and a public square.