Supreme Court Rules Defective Oath Is No Longer Fatal Once Witness Adopts Statement In Open Court And Submits To Cross-Examination

The Supreme Court of Nigeria has fundamentally altered the landscape of trial practice by ruling that a defective or irregularly sworn witness statement on oath is no longer automatically fatal to the admissibility or validity of the evidence. This landmark decision, exemplified by the principles in *Katagum v. Umar*, holds that such defects can be cured if the witness subsequently adopts the statement in open court, takes a fresh oath before the trial judge, and submits to cross-examination. This curative approach marks a significant departure from the previous strict interpretation, as seen in cases like *Nammagi v. Akote*, where procedural irregularities in oath-taking often led to the striking out of crucial evidence. The new position prioritizes the substance of the evidence and the opportunity for testing its veracity over strict adherence to pre-trial formalities, aligning with the spirit of justice and reducing the risk of cases being lost on technicalities.

The Supreme Court of Nigeria has recently delivered a pivotal judgment that redefines the admissibility of witness statements on oath, settling a long-standing procedural conundrum that has frequently plagued litigation across Nigerian courts. This decision introduces a pragmatic and curative approach to irregularities in the administration of oaths for witness statements, shifting the focus from rigid procedural compliance to the substantive truth-seeking function of the courts. The ruling is poised to have immediate and far-reaching implications for legal practitioners, streamlining trial processes and mitigating the risk of meritorious cases being derailed by technical objections.

Historically, a defective oath on a witness statement was often considered a fatal flaw, rendering the entire evidence incompetent and inadmissible, irrespective of its probative value or the witness's subsequent willingness to affirm its contents in court. This strict stance, while emphasizing due process, frequently led to substantial delays and, at times, a miscarriage of justice where crucial evidence was excluded on purely formal grounds. The Supreme Court's latest pronouncement, therefore, represents a significant jurisprudential evolution, prioritizing the essence of justice and the fair hearing principle over an overly technical application of procedural rules.

This article delves into the Supreme Court's reasoning, the statutory framework underpinning the decision, and its practical consequences for legal professionals. It will examine the shift from a strict adherence to formal oath-taking requirements to a more flexible approach that allows for the curing of defects through in-court adoption and cross-examination, thereby ensuring that substance prevails over form in the pursuit of justice.

The administration of oaths and affirmations is a cornerstone of the Nigerian legal system, designed to bind the conscience of a witness and underscore the solemnity of giving evidence, with the attendant risk of perjury for false testimony. The Oaths Act, Cap O1, Laws of the Federation of Nigeria 2004, and the Evidence Act, 2011, provide the legal framework for the taking of oaths and the admissibility of evidence. Specifically, Section 205 of the Evidence Act, 2011, mandates that all oral evidence in any proceeding must be given upon oath or affirmation administered in accordance with the Oaths Act.

Prior to this recent Supreme Court decision, the Nigerian appellate courts often adopted a strict interpretation regarding the validity of witness statements on oath (WSOs). A common challenge arose when a WSO was sworn before an unauthorized person, such as a lawyer who was not a Commissioner for Oaths for the specific proceedings, or where the oath-taking process itself was irregular. In such instances, the prevailing judicial attitude, exemplified by cases like *Nammagi v. Akote* (2021) 3 NWLR (Pt. 1762) 170, was that such a defect was fundamental and rendered the WSO incompetent and inadmissible, regardless of whether the witness later appeared in court to adopt the statement.

This strict approach created a procedural minefield for practitioners, where technical objections to the form of oath-taking could lead to the wholesale rejection of a party's evidence, even if the witness was present and ready to testify to the contents of the statement under a proper oath. The distinction between an affidavit (which is evidence upon filing) and a WSO (which becomes evidence upon adoption and cross-examination in court) was often blurred in practice, leading to significant litigation over the formal requirements of WSOs.

The Supreme Court's recent pronouncement, notably articulated in the principles derived from *Katagum v. Umar*, represents a significant paradigm shift from the strict approach previously adopted. The Court has now clarified that a defective or irregularly sworn witness statement on oath will not be fatal to its admissibility or validity, provided certain curative steps are taken in open court. The core of this new position is that if a witness adopts the statement in open court, takes a fresh oath before the trial judge, and submits to cross-examination by the opposing party, any initial defect in the oath-taking process is cured.

The rationale behind this curative mechanism is rooted in the fundamental purpose of an oath: to bind the witness's conscience to tell the truth and to create liability for perjury. When a witness takes a fresh oath in open court and then adopts their pre-filed statement, the statement is effectively given under a valid oath at that point. The subsequent opportunity for cross-examination further ensures that the opposing party can thoroughly test the veracity and accuracy of the evidence, thereby safeguarding the integrity of the judicial process. This approach ensures that the substance of the evidence, having been subjected to the rigors of the adversarial system, is not sacrificed on the altar of mere procedural technicalities.

This decision effectively overrules the practical effect of earlier strict pronouncements, such as *Nammagi v. Akote* (2021) 3 NWLR (Pt. 1762) 170, where a witness statement sworn before a lawyer (who was not a Commissioner for Oaths for the relevant proceedings) was deemed incompetent and beyond rescue by in-court adoption. The Supreme Court's reasoning is anchored in Section 4 of the Oaths Act, which stipulates that the failure to administer an oath or any irregularity in the form of an oath is a “mere irregularity” that does not affect the decision unless it is shown to have occasioned a miscarriage of justice. This provision now places a higher burden on the party challenging the evidence to demonstrate actual prejudice, rather than merely pointing to a procedural defect.

Furthermore, the Court emphasized the distinction between an affidavit and a witness statement on oath. While an affidavit is generally admissible upon filing, a witness statement on oath only becomes substantive evidence after the witness has adopted it in court and been subjected to cross-examination. This distinction reinforces the idea that the in-court process is the ultimate validator of the witness's testimony, curing any pre-trial formal deficiencies. Even a statement that was “not made on oath or sworn at all” can now be adopted by the witness on oath in court, provided the curative steps are followed.

The Supreme Court's ruling on defective oaths marks a progressive and pragmatic evolution in Nigerian trial practice. By adopting a curative approach, the Court has significantly reduced the likelihood of meritorious cases being lost due to technicalities related to the pre-trial administration of oaths. This decision reinforces the principle that justice should prioritize substance over form, ensuring that relevant and probative evidence, once properly affirmed and tested in court, contributes to the fair determination of disputes.

For legal practitioners, this judgment necessitates a recalibration of trial strategies. While diligence in preparing witness statements remains paramount, the fear of minor irregularities in oath-taking leading to fatal consequences has been considerably allayed. Lawyers can now focus more on the substantive content and presentation of evidence, confident that procedural defects can be remedied through the witness's in-court adoption and submission to cross-examination. However, practitioners must remain vigilant in ensuring that the curative steps—taking a fresh oath, adopting the statement, and submitting to cross-examination—are meticulously followed to validate any previously defective witness statement. This development ultimately promotes greater efficiency and fairness in the administration of justice across Nigerian courts.