Kekere-Ekun JSC in the case of James v INEC Supra, at Page 583-584 Para H-A: “…it is clear that where a court lacks jurisdiction to entertain a cause or matter, it lacks jurisdiction to determine any issue arising within that cause or matter. To attempt to do so would amount to delving into the merit of the case, which would amount to a nullity in the event that the court lacks jurisdiction to determine the suit.”
ISSUES BETWEEN CUSTOMER AND BANKER FALLS WITHIN A STATE HIGH COURT JURISDICTION
So, where any dispute relates to breach of or non-compliance with certain formalities required by law for the lawful operation of banking business, the matter falls within the jurisdiction of the Federal High Court. See: Merchants Bank Ltd. v. Federal Minister of Finance (1961) All NLR 598. It is to be noted as well, where what is involved is only a dispute between a Bank and its customer in the ordinary cause of banking business, like an action by a bank to recover overdrafts granted to the customer, the Federal High Court has no jurisdiction. It is the State High Court that has jurisdiction in such a case. See: Jammal Steel Structures Ltd. v. African Continental Bank Ltd (1973) 1 All NLR (Pt.11)208; Bronik Motors Ltd & Anor v. Wema Bank Ltd (1983) 1 SCLR 296; FMBN v. NDIC (1999) 2 SCNJ 57 at 82.
— I.T. Muhammad, JSC. Adetona & Ors. v Igele (2011) – SC.237/2005