The court in its inherent jurisdiction has definite jurisdiction or power to set aside its own order or decision made without jurisdiction if such order or decision is in fact a nullity and an appeal in such circumstance cannot be said to be necessary. It can thus be said that outside the appellate procedure, a judgment or order can be set aside if it is a nullity or where a court was misled into giving the judgment by some mistake, believing that the parties consented to its being given, whereas, in fact, they did not. See Craig v. Kanseen (1943) K.B. 256 or (1943) 1 All ER 108 at 113; Okoli Ojiako and others v. Onwuma Ogueze and Ors. (1962) 1 All NLR 58; Ekerete v. Eke 6 NLR 118.
— Iguh JSC. Vulcan Gases Limited V. Gesellschaft Fur Industries Gasverwertung A.G.(G.I.V.) ( SC.67/1995, 4th May 2001)