It is trite law that parties are bound by their pleadings: See Obimiami Brick and Stone (Nig.) v. A.C.B. Ltd. (1992) 3 NWLR (Pt.229) 260. The essence of pleadings is to compel the parties to define accurately and precisely the issues upon which the case between them is to be fought to avoid element of surprise by either party. It also guides the parties not to give evidence outside the facts pleaded as evidence on a fact not pleaded goes to no issue – see Onwuka v. Omogui (1992) 3 NWLR (Pt.230) 393; Emegokwue v. Okadigbo (1973) 4 SC 113.
— Katsina-Alu JSC. Engineer Bayo Akinterinwa & Anor V. Cornelius Oladunjoye (SC.98/94, 7 April 2000)