Evidence in Arbitration in Vietnam: 7 Problems Foreign Companies Often Underestimate

A Strong Business Case Can Still Look Weak on the Record

Many parties assume that if the commercial facts are on their side, the arbitration will naturally move in the same direction. That is not how cases are decided. A tribunal works with the record placed before it. If the key proof is missing, unclear, or poorly supported, even a strong business position can look less convincing than it should.

This becomes more important in cross-border disputes, where the record may involve contracts, amendments, notices, delivery records, payment records, technical material, witness input, and expert views. If those parts do not support each other in a clear way, the case becomes harder to understand and harder to decide.

There is also a structural point that foreign companies rarely expect. International frameworks such as the UNCITRAL Model Law and the UNCITRAL Arbitration Rules expressly give the tribunal the power to decide whether evidence is accepted, whether it really matters to the result, and how much weight it carries. Vietnamese arbitration law is less explicit on this assessment power, which is one reason the approach can vary between tribunals and why experienced parties often agree their evidence rules in advance. You should not assume a single fixed standard. The safer assumption is that you must build a record clear and strong enough to persuade under any reasonable approach.

In Vietnam-related arbitration, the safest approach is to treat proof as part of case strategy from the beginning. The file should not be left until the dispute becomes fully hostile. By then, important materials may already be difficult to organize, explain, or recover. This is also why a clear arbitration clause and disciplined records work together, which the clause decides the forum, and the record decides whether you can have more advantages as the case proceeds at arbitration.

More Is Not Always Better

A common mistake is to believe that a bigger volume of evidence makes a stronger file. In practice, a very large record can make the case slower, more expensive, and less focused, especially when much of the material repeats the same point or adds little value to the real issues in dispute, not to mention the cost of translation where needed.

This is one of the practical realities of evidence in arbitration in Vietnam. The tribunal may receive large volumes of material from both sides. When the record is crowded with repetitive or low-value documents, the real points can become harder to see. Instead of strengthening the case, the extra volume may reduce clarity.

A focused record usually serves a party better than an oversized one. What matters is not how much has been submitted, but whether the material helps prove the disputed facts cleanly and directly. In a business dispute, clarity often has more value than volume.

Document Production Is More Controlled Than Some Foreign Parties Expect

Foreign companies sometimes approach arbitration with the expectation that missing proof can be obtained later through a broad production process. That expectation needs to be handled carefully in Vietnam-related cases.

The practical starting point is usually straightforward. Each side is generally expected to bring the proof it relies on. Vietnamese arbitration law does not expressly give one party a right to require the other to produce documents, and court support is available only in limited situations and takes time, which works against the speed that makes arbitration attractive. The process is narrower and more controlled than the broad disclosure model that some parties know from other jurisdictions.

International practice could become useful here. Many international arbitrations use the IBA Rules on the Taking of Evidence as an agreed reference point, and these are familiar to experienced arbitrators worldwide. They include a structured request-to-produce procedure for asking the other side for specific, narrowly defined documents. These rules do not apply automatically in Vietnam. They become relevant only if the parties agree to adopt them, either in the arbitration clause itself or at the first procedural meeting once the arbitration procedure in Vietnam has begun. For a foreign company that wants a more predictable evidence process, agreeing on a recognized international framework early is often more effective than assuming Vietnamese law will provide one.

This does not mean targeted requests are impossible. It means they should be approached with realistic expectations. If a case depends too heavily on material held only by the other side, the evidentiary position may be weaker than it first appears. Good case preparation still starts with the proof already under your own control.

Clear Presentation Often Helps More Than More Argument

Many disputes do not suffer from a shortage of argument, but from a shortage of structure. The legal team may know the case well, and the business team may know the facts well, but the record still does not guide the tribunal clearly from issue to issue.

At that moment, presentation becomes important. In current Vietnam practice, tribunals often need to make practical judgment calls about which documents really matter, which points are central, and how much weight should be given to different parts of the record. A well-organized file helps that process.

A clear file saves time, improves focus, and strengthens credibility. A tribunal should be able to see, without unnecessary effort, what happened, what is disputed, and which materials support each point. When the evidence is presented in that way, the case becomes easier to understand and harder to resist.

Witnesses and Experts Can Help, but They Rarely Rescue a Weak Record

Witness evidence and expert evidence can be very important in Vietnam arbitration, especially in technical, valuation, construction, quality, and performance disputes. But they work best when they support a strong record that already exists.

Many Vietnam-related cases still turn heavily on documents, technical records, party statements, and formal expert conclusions. That means a strong oral presentation will not usually repair basic weaknesses in the underlying proof. A witness can clarify. An expert can explain. But neither will usually replace missing structure in the record.

This is one reason foreign parties should stay realistic about how they build the case. If the document file is weak, witness evidence and expert reports may help only at the margin. If the document file is strong, those tools can be very effective in sharpening the tribunal’s understanding of the dispute.

Court Support Is Limited and Taking Time

Foreign parties sometimes hope the court will help solve an evidence gap. It can, but only within narrow limits, and only at the right point in the process.

First, the party should try to secure the evidence itself, because that is where the burden starts. Second, the tribunal may use its own tools, such as asking witnesses for information or documents, ordering an expert examination or asset valuation, or consulting experts. Third, and only after necessary steps have been taken and the evidence still cannot be obtained, a party or the tribunal may ask the competent court to assist in collecting it from agencies, organizations, or individuals holding it.

So only in limited situations, if the tribunal or a party has already taken necessary steps but still cannot obtain important evidence, the competent court may assist in collecting it. That support can be useful, but it works best when the case team already knows what is missing, why it matters, and what has already been done to obtain it. A party that waits too long, and then hopes the court will repair a proof problem that should have been handled much earlier, usually faces more time, more cost, and more pressure on the case.

Evidence Quality Affects Not Only the Hearing, but Also the Security of the Award

A party may think about evidence only in terms of winning the merits. But evidence also matters because it affects how secure the final result will be if the award is later attacked.

This is one important practical point in evidence in arbitration in Vietnam. Evidence quality affects how clearly the tribunal sees the facts, but it also affects how well the award can stand under later scrutiny. An award can be set aside on limited grounds, and one of them is that evidence relied on by the tribunal is forged. Weak proof may narrow recovery. Unreliable proof may create avoidable risk to the award itself. That value is only fully tested at the stage of enforcement of foreign arbitral awards in Vietnam, where a weak or attackable record can become a real problem.

That is why evidence should be treated as part of outcome protection, not only as part of case presentation. The quality of the record matters all the way to the practical life of the award.

Frequently Asked Questions About Evidence in Arbitration in Vietnam

Q1: What evidence is usually used in arbitration in Vietnam?

Evidence usually includes documents, witness material, expert input, and other forms of proof relevant to the dispute. In practice, documents often remain the starting point, but witnesses and experts may also matter depending on the case.

Q2: Do the parties have to provide the evidence themselves?

Yes. In practice, the first burden stays with the parties, and each side is expected to submit the proof it relies on. That is why early preparation matters so much.

Q3: Can one party make the other side provide documents?

Not in a broad automatic way. Vietnamese arbitration law does not expressly give that right, and the usual approach is narrower and more controlled than some foreign parties expect. Parties who want a structured process often agree to international rules such as the IBA Rules on the Taking of Evidence.

Q4: Is there a fixed set of evidence rules in Vietnamese arbitration?

Not in detail. Vietnamese law is less explicit than international frameworks like the UNCITRAL Model Law on how evidence is accepted and weighed. Because of this, parties often agree their own evidence approach to add predictability. You should not assume the same fixed standard you may be used to in another country.

Q5: Can the tribunal use experts or valuation?

Yes. Expert examination and valuation can be important, especially in technical or financial disputes. But they are most effective when they support a strong core record.

Q6: Can Vietnamese courts help collect evidence?

Only in limited situations. If the tribunal or a party has already taken necessary steps but still cannot obtain important evidence, the competent court may assist in collecting it from those who hold it. It works best when the party has already prepared its case clearly.

Q7: Why does evidence quality matter so much?

Because it affects both the strength of the case and the security of the final result. A weak file can slow the case and reduce recovery. Unreliable proof can put the award at risk.

Conclusion

Evidence in arbitration in Vietnam can shape how clearly the tribunal sees the facts, how efficiently the case moves, and how much value a later award will really have. Foreign companies often focus on the legal argument, but in practice the real weakness is often the file itself.

Vietnamese arbitration gives parties and tribunals workable tools on evidence. The cases that are handled well usually show the same pattern: clear preparation, disciplined records, focused proof, and realistic expectations about how evidence will be handled. 

About the Authors

Written by Tuan Nguyen and Thuong Nguyen, lawyers at ANT Lawyers and contributors to the Vietnam chapter of GAR Know-How: Commercial Arbitration. Their work focuses on arbitration, enforcement, and cross-border dispute strategy for foreign companies doing business in Vietnam.

About ANT Lawyers, a Law Firm in Vietnam

We help clients overcome cultural barriers and achieve their strategic and financial outcomes, while ensuring the best interest protection, risk mitigation and regulatory compliance. ANT Lawyers has lawyers in Ho Chi Minh city, Hanoi, and Danang, and will help customers in doing business in Vietnam.

General Disclamer

This article is for general informational purposes only and does not constitute legal advice for any specific situation. Laws and practice may change, and the position is stated as of the publication date. For advice on your matter, please consult qualified counsel.