By the hearsay rule, an assertion other than one made by a person while giving oral evidence in Court is inadmissible as evidence of the facts asserted. In very simple terms, hearsay evidence is any statement made out of Court but offered in Court to prove the truth of the facts asserted in Court. It is testimony or documents quoting people who are not present in Court, making it difficult to establish its credibility or to test it by cross examination. It is hearsay if the evidence seeks to establish the truth of a statement and not merely the fact that it was made.
— O.A. Otisi, JCA. Brila Energy Ltd. v. FRN (2018) – CA/L/658CA/2017