It is now settled law that jurisdiction is the life blood of adjudication in that any decision by a Court that lacks jurisdiction to hear and determine a matter is a nullity no matter how well conducted see Madukolu vs Nkemdilim 1962 NSCC 374 at 379-380. When can it be said that a Court has jurisdiction to hear and determine a case? As stated earlier, the Supreme Court in the above cited case decided that for a Court to have the requisite jurisdiction to hear a matter: (a) the Court must be properly constituted as regard numbers and qualifications of members of the bench, and no member is disqualified for one reason or another; (b) the subject matter of the case is within the jurisdiction of the Court and there is no feature in the case that prevents the Court from exercising its jurisdiction; and (c) the case comes before the Court initiated by due process of the law, and upon fulfilment of any condition precedent to the exercise of jurisdiction.
— Onnoghen, CJN. Nwachukwu v Nwachukwu (2018) – SC.601/2013