I intend to consider first the Issue of jurisdiction canvassed under Issue 3. It is a threshold issue. It is now universally accepted that when an objection is raised in respect of the competence of a suit or an appeal, the jurisdiction of the court that entertained the suit becomes an issue and that the court has a fundamental, if not imperative, duty to resolve the issue before delving into the merits of the case. See B.A.S.F. NIG. LTD v. FAITH ENTERPRISES LTD (2010) 41.1 NSCQR 381 at page 411 per Adekeye JSC. It is an established principle of Nigerian law that where a court lacks competence to try a person or subject matter before it, whatever decision it arrives at on such a person or subject matter is a nullity: NIGERIAN ARMY v. AMINUN-KANO (2010) 41.1 NSCQR 76. If the suit or appeal was not initiated by due process of court and upon fulfillment of any conditions precedent to the exercise of jurisdiction, the competence of the court to adjudicate in the suit or appeal will be adversely affected: MADUKOLU v. NKEMDILIM (1962) 2 SCNLR 342.
— E. Eko, JCA. SPDC v. Ejebu (2010) – CA/PH/239M/2002