In arbitration in India, evidence and cross-examination are governed not by the Indian Evidence Act, 1872 but by Section 19 of the Arbitration and Conciliation Act, 1996, which frees the tribunal from the Evidence Act and the Code of Civil Procedure while leaving the principles of natural justice intact. Parties still lead documentary evidence, file witness statements on affidavit, and cross-examine witnesses, and a tribunal that refuses a properly requested cross-examination risks having its award set aside under Section 34. This guide explains, stage by stage, how evidence is led and how witnesses are cross-examined, from document disclosure and the Redfern Schedule to expert evidence, the IBA and Prague Rules, and virtual hearings. It covers both domestic arbitration under the 1996 Act and the soft-law frameworks that international commercial arbitrations follow.
This article sets out how evidence and cross-examination in arbitration work in India from the first document request to a Section 34 challenge, and where a single evidentiary misstep can cost a party the award.
Arbitration trades the rigid rules of proof for a procedure the parties themselves shape under Section 19(2), and that freedom is bounded on both sides: Section 18 requires the tribunal to treat the parties equally, and the proviso to Section 24(1) protects a party’s right to an oral hearing on request.
In practice, most Indian arbitrations still run the familiar sequence of documents, witness statements, then oral cross-examination, because that is how a tribunal tests disputed evidence and how a losing party later attacks the award. Our explainer on the wider arbitration procedure in India traces the whole reference from notice to enforcement.
Pleadings
Each side files its statement of claim or defence, with the documents it relies on.
Documentary disclosure
Targeted requests to produce, run on a Redfern Schedule — narrower than court discovery.
Witness statements on affidavit
Evidence-in-chief is filed in writing before the hearing so time is reserved for testing it.
Examination-in-chief
Largely the tendered statement; the witness confirms it and identifies the exhibits.
Cross-examination
The adverse party tests the statement, and leading questions are allowed at this stage.
Re-examination
Confined to matters that arose in cross-examination; it opens no new case.
Expert evidence
A tribunal-appointed expert under Section 26, or party-appointed experts under Article 5 of the IBA Rules.
Award
The tribunal decides on the material properly placed on the record.
Section 34 challenge
If evidence was mishandled, the award can be set aside under Section 34(2)(a)(iii).
The rulebook does not bind the tribunal. The tribunal is not bound by the Indian Evidence Act, 1872; Section 19 lets the parties and the tribunal shape the procedure.
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How evidence is led in arbitration under Section 19 of the Arbitration and Conciliation Act, 1996
Evidence in arbitration is led under Section 19 of the Arbitration and Conciliation Act, 1996, which says the tribunal is not bound by the Code of Civil Procedure, 1908 or the Indian Evidence Act, 1872. Section 19(2) lets the parties agree the procedure the tribunal will follow. Failing that agreement, Section 19(3) lets the tribunal conduct the proceedings as it thinks appropriate, and Section 19(4) spells out that this power includes determining the admissibility, relevance, materiality and weight of any evidence.
Courts have read the principles underlying the two Codes, natural justice, the protection of privilege, and a genuine opportunity to be heard, as principles that still inform arbitration even though the Acts do not bind. The usual formulation is that these principles cannot be abrogated completely. Read together with Section 18, which requires the tribunal to treat the parties equally and give each a full opportunity to present its case, Section 19 marks the real boundary of the tribunal’s discretion.
Does the Indian Evidence Act apply to arbitration?
The Indian Evidence Act, 1872 does not strictly apply to arbitration, because Section 19(1) releases the tribunal from it. The Act operates as a source of principle, not as binding law. Rules that protect a fair process survive the release: legal privilege, without-prejudice protection over settlement communications, and the right to test adverse evidence all continue to apply as principles a fair tribunal respects.
What falls away is the technical machinery. A tribunal need not reject a document because it fails a formal proof requirement, and it can admit hearsay or a photocopy and decide later what weight it deserves.
What power does the tribunal have over the admissibility and weight of evidence?
The tribunal, not a rulebook, decides what evidence comes in and how much it is worth, under Section 19(4). A civil court is bound by the Evidence Act on both questions; an arbitral tribunal is bound by neither. It can receive a document over objection, note the objection, and assign it little weight in the award instead of shutting it out at the threshold.
This matters most with electronic and secondary evidence. Where a court would insist on a certificate under Section 65B of the Indian Evidence Act, 1872 (now Section 63 of the Bharatiya Sakshya Adhiniyam, 2023), a tribunal can treat that certificate logic as instructive rather than mandatory and weigh a WhatsApp message or an email trail on the facts. The better approach, in our view, is still to lead electronic records the compliant way, because an award built on evidence a court would have excluded is easier to attack.
How is evidence in arbitration different from a court trial?
Evidence in arbitration differs from a court trial mainly in who controls the rules: the parties and the tribunal, rather than a statute. The contrast runs across the whole hearing, from what is admissible to who can force a stranger to the arbitration into the witness box. The litigation counterpart is worth a look, and our guide to cross-examination of witnesses under the Indian Evidence Act shows how the same exercise runs inside a courtroom.
| Feature | Court trial | Arbitration |
|---|---|---|
| Is the Evidence Act binding? | Yes; the Bharatiya Sakshya Adhiniyam, 2023 (earlier the Indian Evidence Act, 1872) governs proof | No; Section 19(1) releases the tribunal from the Evidence Act and the Code of Civil Procedure |
| Leading questions in examination-in-chief | Barred, except with the court’s permission | Barred as a borrowed principle; chief is usually the tendered statement |
| Is oral evidence recorded verbatim? | Yes; the court records the deposition | Not necessarily; the tribunal fixes the mode of record, often a transcript |
| Who compels a witness or third party? | The court, through summons and its contempt power | The tribunal cannot; a court is asked under Section 27 |
| Standard and burden of proof | Preponderance of probabilities in civil matters; burden on the party asserting | The same civil standard as principle; the tribunal weighs proof under Section 19(4) |
| Discovery or disclosure? | Wide discovery and inspection under the Code of Civil Procedure | Narrower disclosure through requests to produce, run on a Redfern Schedule |
| Who decides admissibility? | The judge, applying the Evidence Act | The tribunal, under Section 19(4) |
The last row carries the difference that surprises parties most: a tribunal has no coercive power over anyone who never signed the arbitration agreement, so a document held by a third party sits beyond its reach until a court steps in under Section 27.
| Feature | Court trial | Arbitration |
|---|---|---|
| Is the Evidence Act binding? | Yes; the Bharatiya Sakshya Adhiniyam, 2023 (earlier the Indian Evidence Act, 1872) governs proof | No; Section 19(1) releases the tribunal from the Evidence Act and the CPC |
| Leading questions in examination-in-chief | Barred, except with the court’s permission | Barred as a borrowed principle; chief is usually the tendered statement |
| Is oral evidence recorded verbatim? | Yes; the court records the deposition | Not necessarily; the tribunal fixes the mode of record |
| Who compels a witness or third party? | The court, through summons and contempt | The tribunal cannot; a court is asked under Section 27 |
| Standard and burden of proof | Preponderance of probabilities; burden on the party asserting | Same civil standard as principle; tribunal weighs proof under Section 19(4) |
| Discovery or disclosure? | Wide discovery and inspection under the CPC | Narrower disclosure via requests to produce (Redfern Schedule) |
| Who decides admissibility? | The judge, applying the Evidence Act | The tribunal, under Section 19(4) |
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How does documentary evidence and disclosure work in arbitration?
Documentary evidence in arbitration is exchanged through disclosure and targeted requests to produce, not the wide discovery of a civil court. Each side files the documents it relies on with its statement of case, then asks the other side for specific categories of documents it needs but does not hold. The threshold is relevance to the case and materiality to its outcome, and a request that cannot clear that bar is refused.
The soft-law reference point is Article 3 of the IBA Rules on the Taking of Evidence in International Arbitration, which frames the request-to-produce mechanism most international tribunals use. Domestic tribunals borrow the same discipline even when the IBA Rules are not formally adopted.
Privilege and without-prejudice protection sit inside this exchange. Communications made to settle a dispute, and legal advice passing between a party and its lawyers, stay out of the record as a matter of principle, even though the Evidence Act does not bind the tribunal. The logic is familiar from conciliation, and our note on the confidentiality of statements made in conciliation works through how Sections 75 and 81 handle that protection.
The Redfern Schedule and requests to produce documents
The Redfern Schedule is the standard tool for running document production in arbitration, and it is a table, not a pleading. It organises every disputed request into columns so the tribunal can rule request by request instead of wading through correspondence. Most tribunals direct the parties to complete one before the evidentiary hearing.
The four columns do the work:
- The document or category of documents sought.
- The requesting party’s reason: why it is relevant and material.
- The other side’s objection, if any: privilege, irrelevance, or that the document is not in its possession.
- A blank final column for the tribunal’s decision on each line.
Experienced counsel spend real time on the relevance column, because a request framed as a fishing expedition dies in column three.
What can the tribunal do if a party withholds a document?
If a party withholds a document it was ordered to produce, the tribunal can draw an adverse inference against it. This is the tribunal’s main lever, because it cannot jail anyone for non-production or seize files. The inference is a finding that the withheld document would have hurt the party that hid it, and it can be decisive on a contested issue.
Can the tribunal do more than infer? For a party to the arbitration, the adverse inference is the ceiling, and it is often enough, because a party facing an inference on a central document usually produces it rather than accept the finding.
Do witnesses give evidence by affidavit or oral testimony in arbitration?
Witnesses in arbitration usually give their evidence-in-chief in writing, on affidavit or as a signed witness statement, and then appear in person for oral cross-examination. The chief is documentary because it is efficient: the tribunal reads the account in advance, and hearing time is reserved for testing it rather than eliciting it. The oral part is the cross-examination, where the other side probes the statement the witness has already filed.
This two-step practice tracks the pleaded case. A witness statement that wanders beyond the statements of claim and defence invites an objection that the evidence is outside the pleadings, and a partner-site walkthrough of statements of claim and defence in arbitration shows how the pleadings frame what a witness can properly speak to.
A statement filed but never offered for cross-examination carries limited weight if the other side asked to test it and was denied the chance, because untested written evidence is worth less than evidence that survived questioning.
How do you draft a witness statement for arbitration?
You draft a witness statement in the witness’s own voice, in the first person, and in chronological order, tied at every point to the pleaded case. Keep it to facts the witness knows first-hand, and cross-reference each exhibit where it is mentioned.
Leave out argument, law and comment on other witnesses, because those belong in submissions and only give cross-examining counsel openings. Do not include facts outside the witness’s own knowledge, since a witness who cannot answer for a paragraph under cross-examination damages the rest of the statement. And resist the temptation to make the witness say more than the documents support, because the gap between the two is exactly where cross-examination goes.
How are witnesses examined and cross-examined in arbitration?
Witnesses in arbitration are examined in the same three stages used in court: examination-in-chief, then cross-examination, then re-examination. The tribunal borrows this sequence as principle from evidence law, even though the Evidence Act does not bind it. The stages sit in the underlying evidence law, historically in Sections 137 and 138 of the Indian Evidence Act, 1872.
That underlying law changed shape recently. The Bharatiya Sakshya Adhiniyam, 2023 replaced the 1872 Act and renumbered the examination provisions into Sections 137 to 145, though the substance of the three stages carried over largely intact. The change matters mainly for citation, and our guide to the examination sequence under the Bharatiya Sakshya Adhiniyam, 2023 sets out the new section map.
Is the borrowed sequence mandatory? Not as statute, but a tribunal that abandons it without reason invites the fairness challenge the sequence exists to prevent.
Examination-in-chief when evidence is filed on affidavit
Examination-in-chief in arbitration is largely the tendered statement itself, since the witness has already filed the account on affidavit. Counsel usually does no more than have the witness confirm the statement and identify the exhibits, and the hearing then moves to cross-examination. Leading questions, which suggest their own answer, stay barred in chief, just as they are in court, because the point of chief is the witness’s own account.
Is cross-examination a right or the tribunal’s discretion?
Cross-examination in arbitration is not automatic, but where a party asks for an oral hearing under the proviso to Section 24(1), the tribunal must ordinarily allow it and may refuse only in recorded, exceptional circumstances. A tribunal that refuses cross-examination after such a request, without recording compelling reasons, risks breaching natural justice and Section 18.
The Delhi High Court has treated the point directly. In Sukhbir Singh v. Hindustan Petroleum Corporation Ltd., O.M.P. 1118/2014 (Delhi High Court, 16 January 2020), the court held that refusing cross-examination where a party had asked to lead oral evidence can violate natural justice, and described cross-examination as a valuable means of discovering the truth. The practical reading is that a tribunal keeps a narrow discretion to manage the hearing, but not a free hand to deny testing of adverse evidence.
If your opponent has filed a witness statement you need to challenge, put the request for cross-examination on the record, because a refusal on the record is a challengeable order, while a request never made is a complaint the court will not hear.
Re-examination and its limited scope
Re-examination is confined to matters that arose in cross-examination, and it opens no new case. Its only job is to let the witness explain or clarify answers given under cross that were left ambiguous or misleading. Counsel cannot use it to introduce fresh evidence or to plug a gap the cross-examination exposed, and leading questions are barred here too.
How is expert evidence handled in arbitration?
Expert evidence in arbitration comes in by two routes: an expert the tribunal appoints under Section 26 of the Arbitration and Conciliation Act, 1996, or experts each party appoints under soft-law rules such as Article 5 of the IBA Rules. The two routes are not mutually exclusive, and a complex construction or valuation dispute often sees both. The choice shapes how the expert evidence is tested and who the expert answers to.
Tribunal-appointed or party-appointed expert: which route applies?
The route applies according to what the parties agreed and how the tribunal decides to run the technical issues. Under Section 26, the tribunal may appoint one or more experts to report on specific issues, require a party to give the expert relevant information or access, and, on a party’s request or if it thinks fit, have the expert attend the hearing so the parties can put questions and present their own experts on the points in issue. The tribunal-appointed expert answers to the tribunal, which tends to reduce partisanship.
Party-appointed experts follow the Article 5 model of the IBA Rules, where each side instructs its own expert and exchanges reports. The choice turns on the agreement and the nature of the dispute: parties who want a neutral technical read lean on Section 26, while parties who want to control their own presentation lean on party-appointed experts. Many tribunals combine the two, appointing a tribunal expert only where the party experts cannot be reconciled.
Hot-tubbing and witness conferencing in arbitration
Hot-tubbing, also called witness conferencing, has the opposing experts testify at the same time and answer the tribunal’s questions together, rather than one after another. The tribunal, and sometimes counsel, puts a question to both experts in turn, so points of agreement and genuine disagreement surface in real time. It is faster than sequential cross-examination and tends to expose an expert who is stretching, because the rival expert is in the same session to respond.
When can a court be asked to help take evidence in arbitration?
A court can be asked to help take evidence in arbitration under Section 27 of the Arbitration and Conciliation Act, 1996, when the tribunal cannot itself compel a witness or a document. The tribunal, or a party with the tribunal’s approval, applies to the court, which can then summon a witness to give evidence or produce a document under the same powers it uses in its own proceedings.
A tribunal draws its authority from the parties’ agreement, so it has no hold over a stranger to that agreement and no contempt power to back an order against one. A supplier who holds the decisive delivery record, or a former employee who will not appear voluntarily, sits outside the tribunal’s reach until a court steps in. A party that discovers this at the hearing rather than months earlier has usually left it too late, since a Section 27 application takes time the hearing schedule may not allow.
IBA Rules and Prague Rules: the two models for taking evidence in arbitration
Two soft-law frameworks shape how evidence is taken in international arbitration: the more adversarial IBA Rules on the Taking of Evidence in International Arbitration, first issued in 2010 and revised in 2020, and the more inquisitorial Prague Rules of 2018. Neither applies on its own. They bind a tribunal only if the parties adopt them or the tribunal directs their use, and Indian-seated international commercial arbitrations frequently adopt the IBA Rules as a familiar common denominator.
The difference is one of philosophy about who drives fact-finding. The IBA Rules assume party-driven evidence: each side produces documents on request, files witness statements, and tests the other side’s witnesses through cross-examination, with the tribunal as umpire. The Prague Rules, formally the Rules on the Efficient Conduct of Proceedings in International Arbitration, push the tribunal to the front, encouraging it to identify the issues, take the lead in fact-finding, and limit document production and cross-examination in the name of speed and cost.
Which model should a party want? It depends on the case: a party with the documents and a strong witness usually prefers the IBA route, while a party wary of a long production fight may prefer the tribunal-led economy of the Prague Rules. The 2020 revision of the IBA Rules added express provision for remote hearings and tightened the treatment of cybersecurity and data protection.
Is virtual cross-examination reliable in arbitration?
Virtual cross-examination is now routine in Indian arbitration and is generally accepted as reliable, provided safeguards on witness identity, document handling and coaching are in place. What began as a pandemic necessity has settled into standard practice, and tribunals no longer treat a video hearing as a second-best substitute for a physical one.
Protocols in the mould of the Seoul Protocol on Video Conferencing in International Arbitration address the recurring risks: confirming the witness is who they say they are, ensuring no one off-camera is feeding answers, controlling which documents the witness can see, and sharing exhibits on screen so everyone works from the same page at the same moment. An invigilator in the witness’s room, or a required camera sweep, answers the coaching concern that most worries opposing counsel.
Credibility on video is the subtler issue, since a screen flattens the small cues a tribunal reads from a witness in the room. Our deep-dive on the practical problems that arise in virtual cross-examination works through those concerns in detail.
Can an arbitral award be set aside if the tribunal ignores evidence?
An arbitral award can be set aside under Section 34 of the Arbitration and Conciliation Act, 1996 where an evidentiary failure denied a party the chance to present its case. The clearest examples are evidence relied on behind a party’s back and a cross-examination wrongly refused. The statutory hook is Section 34(2)(a)(iii), which allows a court to set aside an award where a party was unable to present its case.
The leading authority is the Supreme Court’s decision in Ssangyong Engineering and Construction Co. Ltd. v. National Highways Authority of India, (2019) 15 SCC 131. The Court set aside an award under Section 34(2)(a)(iii) where the tribunal had relied on a formula drawn from guidelines that were never placed on the record and never put to the losing party, so the party had no opportunity to meet the material that decided the case.
A document slipped in without disclosure, or a witness the tribunal refused to let the other side cross-examine, is not just a procedural irregularity; it is a Section 34 ground that can undo years of arbitration in one hearing. An award set aside on these grounds sends the dispute back to the start, and even an award that survives challenge can face the same natural-justice argument at enforcement. Put everything you rely on squarely on the record, and never let the tribunal decide on material the other side has not seen.
Frequently asked questions
Are leading questions allowed during cross-examination in arbitration?
Yes, leading questions are allowed in cross-examination, which is the stage built for them. They are barred in examination-in-chief and in re-examination, where the point is the witness’s own account rather than counsel’s version of it. Arbitration borrows this distinction from evidence law as a principle, even though the Evidence Act does not bind the tribunal.
Is an affidavit enough, or must the witness appear for cross-examination?
An affidavit or witness statement is the evidence-in-chief, but it is not the end of the matter if the other side asks to test it. A statement whose maker is offered for cross-examination and never challenged stands; a statement whose maker refuses to appear when cross-examination was requested carries little weight. Assume any contested witness statement will have to survive oral questioning.
Can fresh evidence be produced after cross-examination is over?
Only with the tribunal’s leave, and tribunals are cautious about it. Evidence introduced after cross-examination denies the other side the chance to test it, so a tribunal usually admits it only where there is a good reason it could not have come earlier, and often reopens cross-examination if it does. Courts scrutinise late additional evidence closely for the same fairness reason.
Who can compel a reluctant witness or third party to give evidence in arbitration?
Not the tribunal directly, because its authority reaches only the parties before it. A court can, on the tribunal’s request or a party’s application with the tribunal’s approval, under Section 27 of the Arbitration and Conciliation Act, 1996. This is the only route to a witness or document held by someone who never signed the arbitration agreement.
Do the IBA Rules on the Taking of Evidence apply automatically in Indian arbitration?
No, the IBA Rules never apply automatically. They bind a tribunal only if the parties adopt them or the tribunal directs their use, and many Indian-seated international arbitrations do adopt them as a familiar framework. In a purely domestic arbitration, the parties are just as free to run evidence under Section 19 without them.
What is the Brown v. Dunn rule and does it apply in Indian arbitration?
The rule in Browne v. Dunn is a common-law principle that a party must put its case to a witness in cross-examination if it intends to contradict that witness later. It is an English doctrine, not an Indian statute, but its logic, that it is unfair to attack an account the witness was never given a chance to answer, informs how careful counsel run a cross-examination in Indian arbitration. Treat it as good practice and a fairness argument, not as a binding rule the tribunal must apply.
References
Case Law
- Browne v. Dunn (1893) 6 R 67 (HL). English common-law doctrine on cross-examination; cited as persuasive practice, not as Indian statute.
- Ssangyong Engineering and Construction Co. Ltd. v. National Highways Authority of India, (2019) 15 SCC 131
- Sukhbir Singh v. Hindustan Petroleum Corporation Ltd., O.M.P. 1118/2014 (Delhi High Court, 16 January 2020)
Statutes
- Indian Evidence Act, 1872 (sections cited: 65B, 137, 138)
- Code of Civil Procedure, 1908
- Arbitration and Conciliation Act, 1996 (sections cited: 18, 19(1), 19(2), 19(3), 19(4), 24(1) proviso, 26, 27, 34, 34(2)(a)(iii))
- Bharatiya Sakshya Adhiniyam, 2023 (sections cited: 63, 137 to 145)
This article is for informational purposes only and does not constitute legal advice. For specific legal guidance, consult a qualified legal professional.
