Burden of Proof / Onus Probandi /

Burden of Proof: Who Must Prove What

The burden of proof determines who loses when there is uncertainty about a fact. In criminal law, this means the accused wins if the prosecution fails to prove guilt — innocence is the default. In civil law, the person making the claim wins only if they prove it; the defendant wins if the claimant fails. The allocation of the burden is therefore one of the most practically significant rules in evidence law.

Criminal Standard: Beyond Reasonable Doubt

In criminal cases, the prosecution must prove every element of the offence beyond reasonable doubt. This is the highest standard of proof in law — it does not require absolute certainty (an impossible standard) but requires the trier of fact to be 'sure' of guilt. The landmark expression: 'If the jury [judge] is left in doubt, the accused must be acquitted.' A 'reasonable doubt' is a doubt based on reason — not a fanciful or imaginary doubt, but a genuine, logical possibility of innocence based on the evidence. The Supreme Court in Haneef v. State of MP (1998) 3 SCC 391 has held: 'The prosecution must prove the case beyond reasonable doubt by producing evidence to establish guilt; the accused enjoys the benefit of doubt if any remains.'

Civil Standard: Balance of Probabilities

In civil cases, the standard is balance of probabilities (preponderance of evidence) — the party who asserts a fact must show that it is more probable than not that the fact is true (more than 50%). Section 3 BSA: facts are 'proved' when after considering the matters before it, the court either believes it to exist or considers its existence so probable that a prudent man ought, in the circumstances, to act on the supposition that it exists. 'Disproved' is the converse; 'not proved' is the middle ground — neither proved nor disproved.

Shifting Burden and Presumptions

The burden can shift during proceedings: once the prosecution establishes prima facie evidence of the accused's guilt, the evidential burden may shift to the accused to offer an explanation. Statutory presumptions (e.g., NDPS Act Section 35 — drugs found with accused creates presumption of possession) shift the burden to the accused to rebut. Section 105 BSA: burden of proving general exception (insanity, private defence) lies on the accused — to be discharged on balance of probabilities, not beyond reasonable doubt.

“The burden of proof is where the risk of uncertainty falls. In criminal law, it falls on the State — if doubt remains, the accused goes free. This is not weakness; it is the deliberate choice of a society that prefers acquitting guilty persons to convicting the innocent.”