It is settled that evidence led on any matter not pleaded goes to no issue and ought to be disregarded when giving judgment. – Kutigi JSC. Amadi v. Nwosu (1992)
I concede that it is not necessary to plead law before reliance can be placed on it. It is sufficient to plead material facts which will lead to a certain legal result, and once sufficient material facts have been pleaded, the inference to be drawn from such pleaded facts and the particulars of the law to be relied upon for such an inference need not be pleaded. See Vandervell’s Trust (No.2), White v. Vandervell Trustees Ltd. (1974) 3 All E.R. 205 at 213; Anyanwu v. Mhara (1992) 5 NWLR (Pt. 242) 386 at 398 etc.
— Iguh, JSC. Onamade v ACB (1997) – SC.199/1990