“Cause of action necessarily touches on issue of jurisdiction. It is therefore fundamental to adjudicatory competence for a Court to first examine the basis of dispute, that is what led to instituting the suit, which is otherwise called 'Cause of Action''. Any defect in the competence of a court to entertain a matter is fatal, for the proceedings are a nullity, however well conducted. Consequently a determination by any court or tribunal without jurisdiction confers no right or obligation. See Nwosu VS I.S.E.S.A (1990) 2 NWLR (Pt.135) 688”. 

PER S.D.BAGE, J.S.C IN THE CASE OF CHIDI B. NWORIKA VS MRS. ANN ONONEZE-MADU & ORS Legalpedia Electronic Citation: LER [2019]SC.307/2008