Evidence law guide | Updated 20 October 2026

Section 93 Evidence Act: Exclusion of Evidence to Explain or Amend an Ambiguous Document

When a written instrument is ambiguous or defective on its face, a party generally cannot introduce external evidence simply to explain the uncertainty or fill the missing words. This rule, formerly contained in Section 93 of the Indian Evidence Act, 1872, is now found in Section 96 of the Bharatiya Sakshya Adhiniyam, 2023 (BSA).

Current law: The BSA came into force on 1 July 2024. Section 96 corresponds to former Section 93. The application of the repealed Evidence Act to pending proceedings is subject to the savings provision in Section 170 of the BSA.

Meaning and text of the provision

Section 93, Indian Evidence Act, 1872: "When the language used in a document is, on its face, ambiguous or defective, evidence may not be given of facts which would show its meaning or supply its defects."

Section 96, Bharatiya Sakshya Adhiniyam, 2023: The operative rule retains the same wording. It addresses an ambiguity apparent from reading the document itself, without needing external circumstances to expose it.

Important legal expressions

Ambiguous document: A writing whose terms admit more than one uncertain interpretation.
Patent ambiguity: An uncertainty visible on the face of the document, such as two inconsistent prices for one sale.
Defective document: A writing with an apparent omission or incompleteness, such as an essential blank in a deed.
External or extrinsic evidence: Evidence outside the document, including oral statements or surrounding facts, offered to clarify or supplement its language.

Statutory illustrations

Illustration (a): Two alternative prices

Under the former Section 93, A agrees in writing to sell a horse to B for Rs. 1,000 or Rs. 1,500. Evidence cannot be given to establish which price was intended. The current BSA illustration uses one lakh rupees or one lakh fifty thousand rupees instead; the legal principle remains the same.

Illustration (b): Blanks in a deed

A deed contains blanks. Evidence cannot be given merely to show how those blanks were intended to be filled. The court cannot use oral assertions to complete an instrument contrary to this evidentiary rule.

How Section 96 operates in practice

Identify the defect: The uncertainty must appear from the words or blanks of the instrument itself.
Determine the purpose of the evidence: The restriction concerns evidence tendered to explain the patent ambiguity or supply the missing term.
Consider the surrounding legal rules: Questions about validity, rectification, fraud, mistake, or other independently admissible issues require analysis under the applicable substantive law and the remaining evidence provisions; Section 96 is not a complete code for every dispute involving a document.
Do not confuse admissibility with outcome: Excluding explanatory evidence does not, by itself, decide every question of enforceability or remedy.

Patent ambiguity and latent ambiguity

A patent ambiguity is apparent on reading the document and is governed by Section 96 BSA. A latent ambiguity emerges when apparently clear words are applied to actual people, places or property. Different rules may permit evidence in those circumstances, particularly Sections 98 to 101 BSA, depending on the facts. Section 97 BSA addresses plain language that accurately applies to existing facts.

Former Section 91 (now BSA Section 94) concerns proving the terms of documents. Former Section 92 (now BSA Section 95) restricts oral evidence contradicting or varying documented terms, subject to its provisos. Former Section 94 (now BSA Section 97) addresses the application of plain language to facts. These are distinct from the rule about a document defective on its face.

Official statutory references

Bharatiya Sakshya Adhiniyam, 2023 - official India Code PDF (Sections 94-101 and 170).
India Code - central legislation repository (search for the Indian Evidence Act, 1872 and the BSA).

Frequently asked questions

What replaced Section 93 of the Indian Evidence Act?

Section 96 of the Bharatiya Sakshya Adhiniyam, 2023, contains the corresponding rule.

Can oral evidence correct an ambiguous price in a deed?

Not when the price is patently ambiguous on the face of the writing and the evidence is offered to establish which of the conflicting terms was intended, as illustrated by the statute.

Does the rule cover every ambiguity?

No. It addresses apparent ambiguity or defects on the face of the document. Ambiguities revealed by applying otherwise clear language to existing facts are dealt with under separate provisions.

This article is general legal information. The applicable provision and available remedies depend on the proceedings and facts.