In the case of Olukade v Alade (1976) 2 SC 183, this Court summarised the general rule on the effect of the admission of inadmissible evidence:- “A court is expected in all proceedings before it to admit and act only on evidence which is admissible in law (i.e. under the Evidence Act or any other law or enactment relevant in any particular case or matter) and so if the court should inadvertently admit inadmissible evidence it has the duty not to act upon it.”
THE COURTS LEAN AGAINST CALLING FRESH EVIDENCE ON APPEAL
Before concluding on the said prayer 7 it is helpful to call to mind the observations of Oputa JSC in Obasi v. Onwuka (1987) 3 NWLR (Pt. 61 ) 364, 372 in an application to call additional evidence on appeal: “To talk therefore of assessing the rightness or wrongness of the trial court’s verdict today by evidence that will be given tomorrow is to talk in blank prose. This is the reason why appellate courts are very reluctant to admit “fresh evidence”, “new evidence” or “additional evidence” on appeal except in circumstances where the matter arose ex improviso which no human ingenuity could foresee and it is in the interest of justice that evidence of that fact be led:- R v. Dora Harris (1927) 28 Cox 432. But by and large, at least in criminal cases (and the principle should also be the same in civil cases), the courts lean against hearing fresh evidence on appeal.”
— Oguntade, JSC. UBA v BTL (SC. 301/2003, 15 April 2005)