Burden of Proving a Fact Especially Within Knowledge Under the BSA (Section 109): Evidence Act 106 Mapping (2026)

Explainer · Evidence · BSA 2023

Updated for 2026 · Claw Editorial

Some facts are known to one person and no one else. Only the traveller knows whether they bought a ticket. Only the accused knows why they were alone with the victim behind a locked door. Making the other side prove such a fact from the outside would be close to impossible. Section 109 of the Bharatiya Sakshya Adhiniyam, 2023 (BSA) answers this. It puts the burden of proving a fact on the person who alone knows it. This explainer explains the rule, its limits, and the old Evidence Act section it replaced. Last verified October 2026.

01The problem of hidden facts

The normal rule of evidence is simple: the person who asserts a fact must prove it. If you say a contract was signed, you prove the signing. This works for facts that are open to both sides.

It breaks down when a fact lies within one person’s private knowledge. The prosecution cannot climb inside the accused’s head to prove their intention, and it cannot know what happened in a room only the accused and the victim entered. If the law still forced the other side to prove that fact, many true claims would fail for want of evidence no one could reach.

Section 109 is the carve-out for exactly this situation.

02What Section 109 says

When any fact is especially within the knowledge of any person, the burden of proving that fact is upon that person. That is the whole of the rule, and commentary notes that Section 109 of the BSA reproduces old Section 106 of the Evidence Act almost word for word.

When a fact is known to one person alone, the law asks that person to prove it, not the other side to disprove what they cannot see.

The section carries two classic illustrations:

• The ticket. A person charged with travelling on a railway without a ticket must prove they had one, because that fact is especially within their knowledge.
• The intention. When a person does an act with some intention other than what the character and circumstances of the act suggest, the burden of proving that intention is on them.

03The limits of the rule

Section 109 is powerful, so courts keep it within tight limits, especially in criminal cases.

• It does not relieve the prosecution. The rule cannot be used to shift the main burden. The prosecution must still prove the guilt of the accused beyond reasonable doubt. Only once a foundational case is made does Section 109 ask the accused to explain a fact within their special knowledge.
• It covers special knowledge, not mere difficulty. “Especially within knowledge” means facts known exclusively or peculiarly to one person. A fact that is merely hard to prove is not enough.
• It shifts the evidentiary burden, not the legal one. The section moves the duty to come forward with an explanation once the other side has laid the groundwork. The ultimate burden stays where the law placed it.

04Old law to new law: the mapping

The rule moved from the Evidence Act to the BSA with its wording and effect preserved.

So the burden-of-proof scheme sits in Sections 104 onward of the BSA, and Section 109 is the special-knowledge exception to the general rules. For the general rule, see our note on the burden of proof under the BSA.

05How courts use it

In practice, Section 109 appears most often in two kinds of case.

Criminal trials. Where the prosecution proves that a death happened inside a home shared only by the accused and the deceased, the accused may be called on to explain how it happened, because that is within their special knowledge. The explanation does not have to prove innocence, but an absence of any explanation can count against the accused once the groundwork is laid.

Regulatory and revenue matters. Where a fact such as the source of money, or the possession of a permit, lies with one party, the burden of proving it can fall on that party under the same principle.

06Practical points

• Lay the groundwork before you lean on it. Section 109 helps only after you prove the basic facts. Do not treat it as a shortcut around your own burden.
• Identify the special fact precisely. Point to the exact fact within the other side’s exclusive knowledge, not a fact that is merely inconvenient to prove.
• For the defence, give an explanation. If the section is invoked, silence can hurt. A reasonable explanation, even if not fully proved, keeps the burden in balance.
• Keep the beyond-reasonable-doubt standard in view. Remind the court that Section 109 does not dilute the prosecution’s overall burden in a criminal case.

For related rules, see burden of proof under the BSA, dying declarations, and BSA vs Evidence Act key changes.

07Where Claw fits

Claw is an all-in-one legaltech platform for Indian advocates, law firms, and corporate legal teams, combining AI-based case search, an AI legal assistant (Legal GPT), case management, and compliance automation across all Indian courts and tribunals.

How far a court will shift the burden under Section 109 depends entirely on precedent, so the useful step is reading how benches have applied it. Claw opens a body of 30 crore+ judgments to that search, surfacing rulings on Section 109 and the old Section 106 in under 5 seconds. You can also follow a live matter under this provision, tracking its cases, orders and hearings by party or advocate name across 9,102 courts, benches and forums. Supreme Court decisions are covered from 1950 and High Court decisions from 1990. Start from the all-courts case search hub.

Claw does not use customer documents to train its AI models. Create a free Claw account to search special-knowledge rulings and track your own burden-of-proof matter by party or advocate name.

08Sources and further reading

• India Code (Bharatiya Sakshya Adhiniyam, 2023): indiacode.nic.in
• Ministry of Home Affairs (new criminal laws): mha.gov.in
• Claw: clawlaw.in

This explainer is general information, not legal advice. The law changes through amendments and judgments, so check the current text of the BSA and take advice from counsel before you act.

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