What are the 5 most common mistakes witnesses make in cross-examination?

Most witnesses who struggle in cross-examination are not lying. They are honest people who make avoidable mistakes under pressure. This guide sets out the five most common ones and why they matter. It is court familiarisation: the point is to help you give accurate, truthful evidence, never to avoid the truth.

Why do honest witnesses make mistakes?

Cross-examination is designed to test evidence. Under the Evidence Act 1950, the other side may ask leading questions (section 143) and questions testing your credibility (section 146), and may use earlier inconsistent statements to challenge your credit (section 155). In that setting, nerves, pride and a wish to be helpful can push witnesses into errors that make true evidence look unreliable.

Mistake 1: Guessing

A witness is asked "How far away were you?" and, not wanting to seem unhelpful, says "Ten metres" without really knowing. Later, a photograph shows it was thirty. The other side then suggests the rest of the evidence is just as unreliable.

Instead: if you do not know, say so. If you are estimating, say "roughly" or "I'm not sure". See saying "I don't remember".

Mistake 2: Arguing with the lawyer

Some witnesses treat cross-examination as a debate: "Why are you asking me that?" or "Your client is the one lying." This rarely helps. The judge decides the case, not the lawyer, and an argumentative witness can appear partisan.

Instead: answer calmly. If you disagree, say "I disagree" and briefly why. See when the lawyer says you are lying.

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Mistake 3: Volunteering beyond the question

A witness asked "Did you sign the agreement?" replies with a five-minute account of the whole relationship. Long answers can introduce errors, open new topics, and lose the judge's attention.

Instead: answer the question asked, accurately and completely. If a short answer would be misleading, add a brief qualification. "Short" never means incomplete or evasive.

Mistake 4: Exaggerating

Wanting to be believed, a witness turns "he raised his voice" into "he screamed and threatened me", or "a few times" into "every day". When a document or another witness shows otherwise, the exaggeration damages the true part of the evidence.

Instead: describe things exactly as they happened. Accuracy is more persuasive than drama. Deliberately false evidence is also a serious offence under the Penal Code.

Mistake 5: Answering about documents without reading them

The lawyer says, "This email shows you knew about the defect, doesn't it?" and the witness says "yes" without reading it. The email may say something different.

Instead: ask to see the document, read the relevant part, then answer. See notes and documents during cross-examination.

What should I prepare?

• Re-read your own statement and documents before trial.
• Understand the types of questions; see the types of cross-examination questions.
• Tell the lawyer about any error in your statement before trial.
• Accept that you will be challenged; that is normal.

Other mistakes worth avoiding

• Agreeing to a compound question when only part is true.
• Answering before the question is finished.
• Looking to the lawyer who called you for help during cross-examination.
• Discussing your evidence with other witnesses during breaks.

Example

A site supervisor in a construction dispute in Johor Bahru was asked whether the concrete was poured on 5 May. He had planned to say "yes" from memory, but asked to see the site diary first. It showed 7 May. He answered: "According to the site diary I wrote that day, it was 7 May." His careful answer protected the rest of his evidence.

Why does accuracy matter more than confidence?

Many witnesses believe that sounding confident is what makes a judge believe them. In practice, judges look at whether evidence is consistent with the documents, with other witnesses and with common sense. A witness who readily admits what they do not know, corrects a small error, and stays calm under challenge often appears more reliable than one who has a quick answer for everything. All five mistakes above share the same root: putting appearance ahead of accuracy.

When to speak to a lawyer

If you are a party and want to understand the process before trial, talk to your lawyer about how cross-examination works. If you are a witness concerned about your position, get independent advice. Contact us; every case depends on its facts.

Frequently asked questions

Is it a mistake to show emotion?

No. Genuine emotion is human. Ask for a moment if you need one.

What if I realise I made one of these mistakes?

Correct it as soon as you can: "I need to correct my earlier answer."

Should I look at the judge or the lawyer?

Either is fine. Many witnesses find it calmer to address the judge.

Is it wrong to say "I'm not sure"?

No. It is often the most accurate answer.

Can these mistakes lose a case?

Cases are decided on all the evidence. Unreliable answers can affect how much weight a judge gives to a witness.

Sources & fact check

Legal points in this article were checked against the primary sources below. The law can change; this is general information, not legal advice.

1. Evidence Act 1950 (Act 56), Part III Chapter X: examination of witnesses (ss.137-166), AGC Laws of Malaysia
2. Penal Code (Act 574), Attorney General's Chambers Laws of Malaysia
3. Office of the Chief Registrar, Federal Court of Malaysia (Judiciary portal)

Fact-checked on 17 Oct 2026