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.”
RELEVANCY, ADMISSIBILITY, AND WEIGHT ARE IN SEPARATE DEPARTMENT IN THE LAW OF EVIDENCE
In the Law of Evidence, Relevancy, Admissibility of evidence, and weight to be attached to evidence, all these are each in a separate department. What value or weight to be attached to a piece of evidence, once it is admitted as evidence, is for the Jury, the judges of facts. And here in Nigeria, the trial judges sit in a dual capacity, qua Judges of law in matters of law and qua jury in matters of fact In my view, with due respect to the counsel, his criticism of the Tribunal is unwarrantable and so unjustified. It was for the Tribunal to accept or not to accept the evidence by the p.w.5. It was for it as well to ascribe weight or no weight to the exhibits. To be in the best position to reach a conclusion on the testimony of the p.w. 5 and the value to attach to the exhibits it adopted, in my view, the proper and right approach to reach its conclusion.
— Nsofor, JCA. Ugo v Indiamaowei (1999) – CA/PH/EP/97/99