The Centre for Democratic Development (CDD-Ghana)
said on Thursday that it was "deeply disturbed by the NPP's attempt to stall the transition through legal action".
A statement signed to the GNA by Prof. Emmanuel Gyimah-Boadi, Executive Director, said: "While this is within the party's right, even a legal victory would not overturn the political and electoral mandate of the December 28 vote.
"The best thing now for Ghana's democratic credentials - and for the NPP's credibility - would be for the party to allow the democratic process to move forward and be prepared to concede defeat after the Tain election."
The New Patriotic Party (NPP) filed an ex-parte motion to stop the Chairman of the Electoral Commission, Dr Kwadwo Afari-Gyan from declaring the results.
The case was filed by the NPP and its chairman Mr. Peter MacManu. They were represented by Mr Samuel Cudjoe.