It is correct, as submitted, that Section 126(a)-(d) of the Evidence Act, 2011 provides inter alia that “oral evidence must, in all cases whatever, be direct”. The rationale for the rule can be said to be: (1) The unreliability of the original maker of the statement who is not in Court and not cross-examined; (2) The depreciation of the truth arising from repetition; (3) Opportunities for fraud; (4) The tendency of such evidence to lead to prolonged inquiries and proceedings; (5) Hearsay evidence tends to encourage the substitution of weaker evidence for stronger evidence.
— J.H. Sankey, JCA. Brila Energy Ltd. v. FRN (2018) – CA/L/658CA/2017