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…”
INHERENTLY INADMISSIBLE EVIDENCE CAN BE EXPUNGED AT ANYTIME
Incontestably, if a party fails to register an objection to the admissibility of a document in the bowel of a trial Court, he is estopped from opposing its admission on appeal. This hallowed principle of procedural law is elastic. It admits of an exception. Where a document is inherently inadmissible, as in the instant case, the rule becomes lame. The law grants a trial Court the unbridled licence to expunge admitted inadmissible evidence at the judgment stage. An appellate Court enjoys the same right so far as the document is inherently inadmissible. The wisdom behind these is plain. A Court of law is drained of the jurisdiction to act on an inadmissible evidence in reaching a decision, see Alade v. Olukade (1976) 2 SC 183; IBWA v. Imano Ltd. (2001) 3 SCNJ 160; Durosaro v Ayorinde (2005) 8 NWLR (pt. 927) 407; Namsoh v. State (1993) 5 NWLR (Pt. 292) 129; Abubakar v. Joseph (2008) 13 NWLR (Pt. 1104) 307; Abubakar v Chuks (2007) 18 NWLR (pt. 1066) 389; Phillips v. E.D.C. & Ind. Co. Ltd. (2013) 1 NWLR (pt. 1336) 618; Nwaogu v. Atuma (2013) 11 NWLR (Pt. 1364) 117.
— O.F. Ogbuinya, JCA. Impact Solutions v. International Breweries (2018) – CA/AK/122/2016