A showdown is looming over league table credit on the €3bn ($4.1bn) sale of NIBC after ABN Amro and Goldman Sachs claimed roles on the transaction, despite NIBC's denial that they were involved in the deal.

NIBC agreed the €3bn ($4.1bn) deal with Kaupthing yesterday. At that point, it was being advised by its own bankers and also by Ravi Sinha, the most senior representative in Europe to JC Flowers, the private equity firm that owns NIBC.