The law is equally well settled that where inadmissible evidence is admitted, it behooves the trial Court to expunge such evidence from the record and consider if there is any viable evidence upon which the charge could be sustained. In essence, the wrongful admission of an evidence ought not to totally affect the decision of the Court unless the use of such evidence has resulted in occasioning a miscarriage of justice.
– Saulawa, JSC. Makanjuola v. State (2021)
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Where there is documentary evidence on an aspect of a party’s case, no oral evidence is admissible on that aspect. This is because our adjectival law does not admit oral evidence on an aspect or area covered by a document. A party cannot benefit from two ways: documentary evidence and oral evidence. He can only lead evidence in respect of one and not the two of them. But this principle of law is subject to an important qualification and it is this. If the parties by their ad idem agree by oral agreement to change part of the written agreement, the court will not reject the oral agreement.
– Niki Tobi, JSC. Brossette v. Ilemobola (2007)
It has to be pointed out here that what determines admissibility or otherwise of a particular piece of evidence or document is the Evidence Act and not the common law. See also R. v. Agwuna (1949) 12 WACA 456 at 458. — S. Galadima, JCA. Jadesimi & Anor. v. Egbe (2003)
The fact that a document has been admitted in evidence, with or without objection, does not necessarily mean that the document has established or made out the evidence contained therein, and must be accepted by the trial Judge. It is not automatic. Admissibility of a document is one thing and the weight the court will attach to it is another. The weight the Court will attach to the document will depend on the circumstances of the case as contained or portrayed in the evidence.
— N. Tobi JSC. Musa Abubakar v. E.I. Chuks (SC.184/2003, 14 DEC 2007)
The Supreme Court in Omega Bank (Nig) Plc v. O.B.C. Ltd. [2005] 8 NWLR (Part 928) 547 at 587 Paragraphs C – D per Tobi, JSC (as he then was) the Apex Court held inter alia that: “… It is my view that where a document is not signed, it may not be admitted in evidence. Even if it is admitted in evidence, the Court should not attach any probative value to it. This is because a document which is not signed has no origin in terms of its maker….at page 582 Paragraph A, His Lordship, Tobi, JSC of blessed memory further emphasized that:” A document which is not signed does not have any efficacy in law. As held in the cases examined, the document is worthless and a worthless document cannot be efficacious…”
Kuruma, Son of Kaniu v. The Queen (1955) A.C. 197 at p.203, observed. “In their Lordships’ opinion the test to be applied in considering whether evidence is admissible is whether it is relevant to the matter in issue. If it is, it is admissible and the court is not concerned with how the evidence is obtained. While this proposition may not have been stated in so many words in any English case, there are decisions which support it, and in their Lordships’ opinion it is plainly right in principle. There can be no difference in principle for this purpose between a civil and a criminal case. No doubt in a criminal case a judge always has a discretion to disallow evidence if the strict rule of admissibility would operate unfairly against an accused.”
When it is a question of admission of evidence, strictly, it is not whether the method by which it is obtained is tortious but excusable, but whether what has been obtained is relevant to the issue being tried. See Kuruma v. R. (1955) AC 197.
— Ogwuegbu JSC. Oshunrinde v Akande (1996) – SC.110/1990
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