Locus standi has been defined as the legal capacity to institute an action in a court of law. Where a plaintiff lacks locus standi to maintain an action, the court will lack the competence to entertain his complaint. It is therefore a threshold issue which affects the jurisdiction of the court. See Daniel v. I NEC (2015) LPELR – SC.757/2013; Thomas v. Olufosoye (1986) 1 NWLR (Pt. 18) 669, (1986) 1 NSCC 323; Opobiyi and Anor. v. Layiwola Muniru (2011) 18 NWLR (Pt. 1278) 387 at 403- F. It is also trite that in determining whether a plaintiff has the necessary locus to institute an action, it is his pleadings that would be considered by the court. The claimant must show sufficient interest in the subject matter of the dispute. See Emezi v. Osuagwu (2005) All FWLR (Pt. 259) 1891, (2005) 12 NWLR (Pt. 93) 340; Momoh and Anor. v. Olotu (1970) 1 All NLR 117; Attorney-General, Anambra State v. Attorney-General, Federation and Ors. (2005) All FWLR (Pt. 268) 1557, (2005) 9 NWLR (Pt. 931) 572.
— Kekere-Ekun, JSC. Nyesom v. Peterside (SC.1002/2015 (REASONS), 12 Feb 2016)