Illegality of a contract or transaction, whenever it is raised as a defence to a claim founded on the said transaction, impacts on the jurisdiction of the court. When the contract on which the plaintiff sues is ex facie illegal, the courts will decline to enforce it for the courts exercise their jurisdiction only to administer the law of the land. They do not exercise their jurisdiction to help the Plaintiff break the law. See GEORGE & ORS v. DOMINION FLOUR MILLS LTD (1963) 1 ALL NLR 71; IBRAHIM v. OSIM (1988) NWLR 257; BARCLAYS BANK D.O.C. v, MEMUNATU HASSAN (1961) ALL NLR 836.
— E. Eko, JSC. CITEC v. Edicomisa (2017) – SC. 163 2006