A Trial Simulator Is Not a Lawyer. It Is 3 Rehearsals You Could Not Afford

What does a trial simulator actually do?

It reads what you give it, the claim, the defence, your documents and your account, and runs a hearing on that material. One voice asks the neutral questions an adjudicator would; another takes the other side's position and pushes on the gaps. At the end it lists what was asked that you could not answer with a date or a document.

The rehearsal is only as good as the file you give it. Load the documents in the order they will sit in your bundle, the other side's claim or defence word for word rather than your summary of it, and the exact amount in dispute with how it is calculated. A simulator working from your paraphrase will ask the questions you already expect.

That is the whole value. A lawyer's first meeting costs money and still leaves you to deliver the case yourself in a tribunal where the lawyer may not appear. A rehearsal costs little and can be run again the night before. What it cannot do is tell you what the law requires in your case, or how a particular adjudicator will weigh your evidence.

What will the real hearing look like?

Small claims hearings are built for people without lawyers, and they are led from the bench. That shapes what you should rehearse: short, factual answers to questions, not speeches.

• Hong Kong runs a case in stages: a call-over where a Tribunal Officer interviews both sides, one or more mention hearings, then trial. At trial each witness gives evidence, is cross-examined by the other party, and may be re-examined; final submissions are optional (Pamphlet 5, 2023). The Tribunal must itself inquire into anything relevant (s.16(3)).
• New Zealand's referee leads you through the hearing, tries to help the parties agree, and both parties and the referee may question witnesses.

Rehearsal 1: tell it in order, against a clock

The first question in almost every hearing is some version of what happened? Most self-represented parties answer it badly: out of order, with the grievance first and the dates last. The fix is mechanical.

Rehearsal 2: answer the questions your own bundle raises

The Judiciary's pamphlet tells parties to read every witness statement and document served by the other side and formulate [a] line of cross-examination on each of their witnesses. The reverse is just as useful: what will the other side ask you?

A simulator is good at this because it reads your bundle the way an opponent does, looking for the unexplained delay, the missing receipt, the email that says something slightly different from your statement. Answer each question in one or two sentences and name the page that supports the answer. If you number your pages the way Hong Kong's Tribunal asks, C1, C2 for a claimant and D1, D2 for a defendant (Pamphlet 6), the answer can simply be page C7.

Then swap roles. Ask the simulator to play the other side's main witness and practise your own cross-examination: short questions, one fact each, ending when you have the answer you need.

Rehearsal 3: defend your weakest document

Every case has one: the unsigned quotation, the screenshot with no date, the WhatsApp message that can be read two ways. Pick it deliberately and let the simulator attack it for ten questions.

You are testing whether the document survives without you over-explaining it. Often the answer is to support it with something else, such as the bank transfer that matches the unsigned quotation, rather than to argue about the document itself. Sometimes the answer is to stop relying on it.

If the weak document is the other side's, run the same exercise from their seat. The questions you would put to it are the ones to ask at trial, in the order the simulator found most effective.

What can't a simulator do?

Be clear about the limits before you rely on a run. Each of these is a reason to treat the rehearsal as practice and the court's own publications as the rules.

• Give legal advice. It can point out that a question has no answer in your file; whether the law requires one is a question for a lawyer or the Tribunal's own information services.
• Predict the outcome. It predicts questions, not decisions. A clean rehearsal means your story holds together, not that you will win.
• Know everything about local practice. Forms, fees and deadlines change. Check them against the court's own pages, which are the sources we cite.
• Replace the evidence. Only documents and witnesses prove facts. A good rehearsal only makes it easier for the adjudicator to see what you have.

Is it acceptable to prepare with AI?

Yes, if you remain responsible for what you file. Singapore's Guide on the Use of Generative AI Tools by Court Users, applying since 1 October 2024 to courts including its Small Claims Tribunals, does not prohibit generative AI in preparing court documents, but makes self-represented persons responsible for ensuring that everything given to the court is independently verified, accurate, true, and appropriate.

Hong Kong has no equivalent for court users yet. The Judiciary's own guidelines of July 2024 tell judges that where a litigant in person appears to have used generative AI to prepare documents, they should ask what checks for accuracy have been undertaken; on 13 April 2026 the Judiciary said guidelines for practitioners and other court users were being drawn up. Rehearsing aloud leaves nothing in your filed documents to check, but anything the simulator suggested that you then write down is yours to verify.

Turn each run into a gap list

A rehearsal is only useful if it changes the bundle. After each run, sort what went wrong into one of four gaps and fix it before the next hearing date.

• Hong Kong: if a witness will not come voluntarily, apply for a witness summons at least three weeks before the trial date (Pamphlet 5).
• Anywhere: bring the originals, and copies for the other side and the tribunal.