Minister says he heard after action had been decided, and did not advise Cabinet.
Foreign Affairs Minister Murray McCully was briefed on the need to seize Kim Dotcom's assets at the time his officials were worried rejecting requests might upset the United States.
But Mr McCully said his role was confined to being briefed - and the discussions happened after the raid on Mr Dotcom's mansion.
Few details have emerged of how New Zealand's diplomats responded to the need to underwrite the US case with local taxpayer money.
The need to do so was driven by the Crown Law Office's failure to use the right restraining order to seize Mr Dotcom's property. They were meant to give notice of the seizure but deprived the internet tycoon of the ability to challenge the order.