What burden of proof means
The burden of proof answers a simple question: if the evidence leaves the court unsure, who loses?
The general rule under the Evidence Act is that whoever asserts a fact must prove it. A claimant asserting that money was lent must prove it. A defendant asserting that it was repaid must prove that.
The standard of proof is how convinced the court must be.
In civil cases it is the balance of probabilities: more likely than not. A claimant who establishes that their version is fifty one percent likely has discharged it.
In criminal cases it is proof beyond reasonable doubt, which is a much higher standard, and it rests on the prosecution throughout.
Where an allegation of a criminal nature is made in a civil case, such as fraud, Nigerian courts require it to be proved to the criminal standard, which is a significant practical hurdle for anybody pleading fraud in a commercial dispute.
How it is used
Two burdens operate, and confusing them causes real problems.
The legal burden sits with the party who asserts and does not move. If at the end of the case the court is not satisfied, that party loses.
The evidential burden shifts. Once a claimant has produced enough evidence to establish a case, the practical need to respond passes to the defendant. If they produce nothing, the claimant's evidence stands.
That is why a defendant who files nothing and attends nothing generally loses even where the claim was weak.
In practice the burden is discharged with documents. A signed agreement, a receipt, a bank statement, a dated photograph, a delivery note. Oral evidence is admissible and it is weighed, and where two witnesses contradict each other with nothing else, the party bearing the burden is the one in difficulty.
That is the whole practical argument for putting things in writing. It is not that a verbal agreement is unenforceable. It is that the person who has to prove it may not be able to.
Key features
- Whoever asserts a fact generally bears the burden of proving it
- The civil standard is the balance of probabilities
- The criminal standard is proof beyond reasonable doubt
- Allegations of a criminal nature in civil cases require the higher standard
- The legal burden does not shift; the evidential burden does
- Documents are how the burden is usually discharged
How this works in Nigeria
The Evidence Act 2011 governs, and three practical consequences follow for anybody in a Nigerian dispute.
The first is fraud. Pleading fraud in a commercial case sounds forceful and it raises the bar you must clear, because it must be proved beyond reasonable doubt. A claimant who could have won on breach of contract, and who pleaded fraud instead, may lose on a standard they did not need to meet.
The second is documents. Nigerian civil practice front loads evidence, so the documents you will rely on are filed at the outset. A party who cannot produce a document at that stage is unlikely to be able to prove the fact it would have established.
The third is presumptions. In some situations the law presumes a fact and the burden falls on the other side to displace it. Possession of goods, regularity of official acts and the due execution of documents thirty years old from proper custody are examples. Knowing which presumptions apply can shift the practical burden considerably.
For businesses, the operational takeaway is unchanged: keep signed agreements, issue receipts naming what they are for, confirm important conversations by email the same day, and file things where you can find them. Litigation is decided on what can be proved, not on what happened.
Balance of probabilities vs beyond reasonable doubt
Two standards, with a large gap between them.
The balance of probabilities is the civil standard. The court asks which version is more likely than not. A claimant who tips the scale, however slightly, has discharged the burden.
Proof beyond reasonable doubt is the criminal standard. The court must be sure. A doubt based on reason, arising from the evidence, means acquittal, and the burden rests on the prosecution throughout without shifting to the accused.
The gap explains outcomes that look inconsistent to non lawyers. A person acquitted of a criminal charge can still be found liable in a civil claim arising from the same facts, because the civil claimant only had to prove it was more likely than not.
It also explains why pleading fraud in a civil case is a strategic decision rather than a rhetorical one. It imports the higher standard into a case that would otherwise have been decided on the lower one.
Limits and risks
The rule that whoever asserts must prove can be harsh where the evidence sits with the other side. A claimant alleging that a company mismanaged its affairs must prove it from outside the company.
Discovery helps but is limited, and a party who genuinely cannot access the evidence may fail on a claim that was true.
Presumptions are technical and easy to overlook, and a party who does not raise the one that helps them carries a burden they need not have.
And the standards are applied by judges assessing credibility, which introduces an element no amount of preparation removes.
Worth knowing
Think carefully before pleading fraud in a commercial case. It imports the criminal standard of proof into a dispute that would otherwise be decided on the balance of probabilities, and Nigerian claimants lose cases they would have won on breach of contract by reaching for the stronger sounding allegation.
Questions people ask
Who has the burden of proof?
Generally whoever asserts a fact. A claimant asserting a loan was made proves that; a defendant asserting it was repaid proves the repayment. The legal burden does not shift.
What is the standard of proof in a civil case?
The balance of probabilities, meaning more likely than not. A party who tips the scale, however slightly, has discharged the burden.
What is the criminal standard?
Proof beyond reasonable doubt, which is considerably higher, and it rests on the prosecution throughout without shifting to the accused.
Why is proving fraud harder?
Because an allegation of a criminal nature made in a civil case must be proved to the criminal standard. Pleading fraud raises the bar in a dispute that could have been decided on the lower civil standard.
What is the evidential burden?
The practical need to respond once the other side has produced enough evidence to establish a case. It shifts during a trial, unlike the legal burden, which stays where it started.
How is the burden usually discharged?
With documents: signed agreements, receipts, bank statements, dated photographs and delivery notes. Where two witnesses contradict each other with nothing else, the party bearing the burden is the one in difficulty.