Injured in Ontario? Get clear legal guidance today.
Our personal injury team can help with accident, disability, and injury claims. Contact us today for a free consultation.
An examination for discovery is a formal pre-trial procedure in Ontario civil litigation where the opposing party’s lawyer questions you under oath.
It usually takes place after pleadings are exchanged and documents are produced. Everything you say is recorded and may be used later at trial.
At a Glance
- Examinations for discovery are governed by Rule 31 of Ontario’s Rules of Civil Procedure.
- You are examined under oath, and everything you say is recorded by a court reporter.
- The insurer’s lawyer may ask about your background, the accident, your injuries, your medical history, and your losses.
- Each party is generally entitled to seven hours of discovery time, although complex cases may require more.
- You may say “I don’t know” or “I don’t remember” when that is true. You must not guess.
- You may be required to give undertakings — formal promises to provide additional information or documents.
- Inconsistencies between your discovery answers and trial testimony may be used to challenge your credibility.
- Preparation with your lawyer before discovery is essential.
If you have started a personal injury lawsuit in Ontario, the examination for discovery is one of the most important stages in your case — and one of the least understood by people who have not been through litigation before.
It is not a trial. It is not a hearing. You will not usually be in a courtroom with a judge. But it is a formal legal proceeding conducted under oath, and what you say may follow you through the rest of your case. Plaintiffs who are well prepared usually go into discovery with greater confidence. Plaintiffs who are not prepared may face a more difficult experience and potentially a more difficult trial.
This guide explains what happens at an examination for discovery in an Ontario personal injury lawsuit, what questions to expect, how your answers may be used, and what preparation can make the difference.
1. What Is an Examination for Discovery?
An examination for discovery is a pre-trial procedure in Ontario civil litigation where each party’s lawyer questions the opposing party under oath. It is governed by Rule 31 of the Rules of Civil Procedure and generally takes place after pleadings have been exchanged and relevant documents have been produced.
The purpose of discovery is to:
- Clarify the issues in dispute.
- Assess the strengths and weaknesses of each side’s case.
- Obtain admissions.
- Narrow the evidence that may be required at trial.
- Explore whether settlement is possible.
Everything said at discovery is recorded. If your answers at trial differ from what you said at discovery, the defence lawyer may use the transcript to challenge your credibility.
In a personal injury lawsuit, discovery usually takes place in both directions. The insurer’s lawyer examines you — the plaintiff — about the accident, your injuries, treatment, and losses. Your lawyer may then examine the defendant, such as the at-fault driver or property owner, about what happened and what they knew.
In the United States, the equivalent procedure is commonly called a deposition. In Ontario, it is called an examination for discovery, often shortened to “discovery” or “discoveries.”
2. Where Discovery Fits in the Personal Injury Litigation Timeline
| Stage | What Happens | Typical Timing |
|---|---|---|
| 1. Statement of Claim | Your lawyer files and serves the lawsuit. | Usually within two years of the accident. |
| 2. Statement of Defence | The defendant responds to the claim. | Usually after service of the claim, subject to procedural rules. |
| 3. Affidavit of Documents | Both parties disclose relevant documents. | After pleadings close. |
| 4. Discovery Plan | Lawyers agree on the scope and schedule of discovery. | Before the examinations. |
| 5. Examination for Discovery | The parties are examined under oath. | Often 12–24 months after the claim is filed. |
| 6. Undertakings | Promised documents and answers are provided. | After discovery, within an agreed or ordered timeline. |
| 7. Mediation | A neutral mediator facilitates settlement discussions. | Often after discoveries are substantially complete. |
| 8. Pre-Trial Conference | A judge reviews the case and encourages settlement. | Before trial. |
| 9. Trial | The case is heard by a judge and sometimes a jury. | Potentially several years after the accident in complex cases. |
Discovery usually sits near the midpoint of litigation — after you and the defendant have disclosed relevant documents but before mediation and trial. For many personal injury plaintiffs, it is the first time they face direct questioning from the other side’s lawyer.
Understanding where discovery fits in your case:
Learn about Ontario’s two-year limitation period and the litigation timeline →
3. Who Attends an Examination for Discovery?
The following people are typically present at a personal injury examination for discovery in Ontario:
- You, the plaintiff: the person being examined.
- Your personal injury lawyer: to assist you and object where appropriate.
- The insurer’s defense lawyer: the lawyer asking the questions.
- A court reporter: the person who records everything verbatim and prepares a transcript.
Before the COVID-19 pandemic, discoveries were often held in boardrooms at court-reporting offices. Today, many Ontario personal injury discoveries are conducted by Zoom or another videoconference platform. The format may feel informal, but the evidence remains formal. You are still under oath, and the court reporter is still recording what you say.
Videoconference reminder:
Nods, head shakes, “uh-huh,” and “mm-hmm” may not create a clear transcript. Say “yes,” “no,” “I don’t know,” or “I don’t remember” clearly and verbally.
The defendant’s insurance-company representative is usually not personally present. The defence lawyer acts on behalf of the defendant and the insurer.
4. What Questions Will You Be Asked?
The scope of questioning at an examination for discovery is broad. Rule 31.06 of Ontario’s Rules of Civil Procedure permits questioning on matters relevant to the issues in the lawsuit.
In a personal injury case, questioning usually covers five main areas.
Area 1: Your Background
- Your full name, date of birth, and address history.
- Your education and employment history.
- Your family situation, including your spouse, children, and dependents.
- Your activities, hobbies, and lifestyle before the accident.
- Any prior accidents, injuries, or health conditions.
Area 2: The Accident
- Where you were going and why.
- What you remember seeing, hearing, and doing before impact.
- What happened during and immediately after the collision.
- What you said to the other driver, witnesses, and police.
- What the other driver said to you.
- Your observations about road conditions, weather, and visibility.
- What you reported in the collision report.
Area 3: Your Injuries and Treatment
- Every symptom you experienced from the accident to the present.
- Every treatment provider you have seen.
- Every hospital and clinic you attended.
- What medications you take or have taken.
- Your current symptoms and their effect on daily life.
- Activities you can and cannot do now compared with before the accident.
Area 4: Your Losses
- Your income before the accident.
- Time missed from work and the reason for the absence.
- Your current work status and any restrictions.
- Out-of-pocket expenses caused by the accident.
- Help provided by family members with household tasks or caregiving.
- Future losses you expect to experience.
Area 5: Your Accident Benefits Claim
- The accident benefits you applied for and received.
- Any disputes with your accident benefits insurer.
- Independent medical examinations arranged by the insurer.
- Treatment plans submitted and whether they were approved.
Questions about your accident benefits claim?
Your accident benefits file may be directly relevant at discovery.
Learn about Ontario accident benefits under SABS →
5. Your Medical History — Why It Matters More Than You Think
The defense lawyer will likely question you in detail about your medical history before the accident. This is one of the areas plaintiffs often find most surprising and uncomfortable — and it is one of the most strategically important parts of discovery.
The defense may argue that some or all of your current symptoms are caused by pre-existing conditions rather than the accident. If your history includes prior injuries, chronic pain, depression, anxiety, or other conditions that overlap with your current complaints, the defense may use that history to dispute the accident’s contribution to your losses.
You are required to answer questions about your medical history accurately and completely. Attempting to conceal a prior condition is one of the most serious credibility mistakes a plaintiff can make. Prior conditions frequently appear in medical records and other productions.
The appropriate approach is honest and precise: disclose prior conditions accurately and allow your lawyer to frame the case around causation or aggravation rather than trying to hide the history.
Practical example:
A plaintiff who had a prior back injury and fails to disclose it at discovery may face serious credibility problems when the defence obtains the complete medical records. A plaintiff who discloses the prior injury accurately, and whose medical evidence shows that the later accident significantly aggravated the condition, is in a much stronger position.
6. Undertakings and Refusals
An undertaking is a formal promise made during discovery to provide additional information or documents after the examination. When you cannot answer a question because the information is not available, your lawyer may give an undertaking to obtain the answer and provide it later.
Common undertakings in personal injury discoveries include:
- Providing complete names and addresses for treating practitioners.
- Providing copies of documents that were discussed but not produced.
- Confirming specific dates, amounts, or details you could not recall.
- Obtaining records from third parties that hold relevant information.
Undertakings must be satisfied within the agreed or court-ordered timeline. Failing to fulfill them may lead to court sanctions or restrictions on the evidence that can be presented later.
A refusal occurs when your lawyer objects to a question and does not permit you to answer. Refusals may be based on solicitor-client privilege, irrelevance, or questions that are oppressive, misleading, or otherwise improper. The opposing party may bring a motion asking the court to compel an answer.
7. How to Answer Questions — The Rules That Protect You
Discovery is not a test of how much you know. It is a test of what you actually know, remember, and can accurately describe. The rules for answering are straightforward, but applying them under pressure requires preparation.
| Rule | What It Means in Practice |
|---|---|
| Answer only what is asked | Do not volunteer information beyond the question. Short, precise answers are usually better than long explanations. |
| Say “I don’t know” when you do not know | Never guess. A guess that later proves wrong may become an inconsistency. |
| Say “I don’t remember” when you do not remember | You are not expected to remember every detail. Claiming a memory you do not have is worse than acknowledging you cannot recall. |
| Ask for clarification | You are entitled to understand the question before answering. Ask the lawyer to rephrase it when necessary. |
| Pause before answering | Take time to think. Discovery is not a speed test. |
| Use complete words | Say “yes” and “no” clearly. Avoid nods or ambiguous sounds that may not create a clear transcript. |
| Do not argue | Remain calm and answer factually. Ask for a break if you become tired or upset. |
| Tell the truth | You are under oath. Inconsistencies may be used against you later. |
8. How to Prepare for Your Examination for Discovery
Preparation with your personal injury lawyer is essential. A well-prepared plaintiff understands the process, has reviewed the relevant documents, and has thought carefully about the key events and how to describe them accurately.
Preparation typically includes:
- Reviewing the Statement of Claim: understanding what has been alleged on your behalf.
- Reviewing the Affidavit of Documents: knowing what has been disclosed and produced.
- Reviewing your medical records: understanding what your treatment providers documented and where discrepancies may exist.
- Recounting the accident: describing what happened in sequence without exaggeration.
- Describing your injuries: explaining current symptoms, limitations, and the course of your recovery in plain language.
- Identifying prior injuries or conditions: discussing them honestly and accurately.
- Understanding your losses: knowing your employment history, income details, and out-of-pocket expenses.
- Practicing anticipated questions: becoming comfortable with the format and pace of questioning.
Preparation meetings with your lawyer are protected by solicitor-client privilege. The defence cannot ask what your lawyer told you during preparation, and you do not have to disclose the substance of those discussions.
Navigating a personal injury lawsuit?
Our motor vehicle accident team guides clients through every stage, from the accident through settlement or trial.
Learn about Cambria Law Firm’s car accident legal services →
9. Common Mistakes Plaintiffs Make at Discovery
| Mistake | Why It Hurts Your Case | What to Do Instead |
|---|---|---|
| Guessing | A wrong guess may become an inconsistency that the defence uses later. | Say “I don’t know,” “I don’t remember,” or “I would need to check.” |
| Volunteering more than asked | Extra information may open new areas of questioning. | Answer the specific question and stop. |
| Downplaying symptoms | Minimizing your injuries may lock you into an inaccurate damages narrative. | Describe both good days and bad days honestly. |
| Concealing prior conditions | The records may reveal the condition, making concealment more damaging than the condition itself. | Disclose prior conditions accurately. |
| Becoming angry or combative | Emotional outbursts may undermine credibility. | Remain calm and request a break when necessary. |
| Failing to review documents | Being surprised by your own records may make you appear unprepared. | Review the productions with your lawyer before discovery. |
| Describing only your worst day | Surveillance or records showing more activity may create an apparent inconsistency. | Describe your best days, worst days, and average days. |
10. What Happens After the Examination for Discovery?
After both sides have been examined, the case generally moves into the undertakings, settlement, mediation, and pre-trial stages.
Fulfilling Undertakings
Both sides must satisfy the undertakings given during discovery within the agreed timeline. Your lawyer will track the undertakings and manage the responses.
Mediation
Many Ontario personal injury cases proceed to mediation after discoveries are substantially complete. A neutral mediator facilitates settlement discussions. The mediator does not decide the case. The decision to settle or proceed remains yours.
Many personal injury claims resolve at or around mediation. Cases that do not settle may proceed to a pre-trial conference and eventually to trial.
How Discovery Affects Settlement
Discovery can significantly affect settlement negotiations. A plaintiff who answers clearly, consistently, and credibly may be in a stronger position at mediation. A plaintiff who appears evasive, inconsistent, or unprepared may give the defence reasons to discount the claim.
This is one of the most direct ways your performance at discovery may influence the outcome of your case, even if the claim never reaches trial.
11. Potential Changes to Ontario’s Discovery Rules
Ontario’s civil litigation rules have been under review. Proposed reforms have included a multi-track system for civil cases and shorter oral discoveries in some types of claims.
As of July 2026, any proposed reforms that have not yet taken effect do not replace the rules currently governing active personal injury litigation. Your lawyer will advise which procedural rules apply to your case and how any future changes may affect the timeline or scope of discovery.
Concerned about procedural changes during your lawsuit?
Rule changes during active litigation require careful management.
Our personal injury team stays current on procedural developments →
Key Takeaways
- An examination for discovery is formal evidence taken under oath.
- Prepare carefully with your lawyer by reviewing documents, prior medical history, and anticipated questions.
- Answer only what is asked and do not volunteer unnecessary information.
- Say “I don’t know” or “I don’t remember” when that is true.
- Describe both good days and bad days accurately.
- Disclose prior injuries or conditions honestly.
- Remain calm and request a break when needed.
- What you say at discovery may follow you to trial, so consistency matters.
Related Reading
Frequently Asked Questions
What is an examination for discovery in Ontario?
An examination for discovery is a formal pre-trial procedure in Ontario civil litigation where the opposing party’s lawyer questions you under oath. It usually takes place after pleadings are exchanged and relevant documents are produced. Everything said is recorded by a court reporter and may be used at trial.
Do I have to answer every question at an examination for discovery?
You generally must answer relevant questions unless your lawyer objects on a proper legal ground, such as solicitor-client privilege, irrelevance, or an improper question. You are not required to guess. If you do not know or cannot remember, say so. Your lawyer may give an undertaking to provide the information later.
Can what I say at discovery be used against me at trial?
Yes. Discovery evidence is given under oath. If your trial testimony differs from what you said at discovery, the defence lawyer may use the transcript to challenge your credibility.
How long does an examination for discovery take in Ontario?
Ontario’s Rules of Civil Procedure generally provide each party with up to seven hours to examine the other parties, subject to agreement or court order. A straightforward personal injury discovery may take two to four hours, while complex cases may take longer.
What happens if I cannot remember something?
Say “I don’t remember” or “I can’t recall.” You are not expected to remember every detail. Do not guess. If the information can be confirmed through documents or records, your lawyer may undertake to provide it later.
Will I be asked about my prior medical history?
Yes. Prior accidents, injuries, surgeries, and medical conditions are commonly explored, especially where they overlap with your current symptoms. You should answer accurately and completely. Concealing a prior condition may cause more harm to your credibility than the condition itself.
What is an undertaking in a discovery?
An undertaking is a formal promise to provide additional information or documents after the examination. Common examples include confirming dates, providing treatment-provider information, or producing documents that were discussed but not available during discovery.
Do all personal injury cases in Ontario go to trial?
No. Many personal injury cases settle before trial, often during or after mediation. Cases that do not settle may proceed to a pre-trial conference and eventually to trial. How the case is prepared and how the plaintiff performs at discovery may affect settlement negotiations.
Should I have a personal injury lawyer before my examination for discovery?
Yes. Discovery is a formal legal proceeding that creates evidence that may be used later. A lawyer can help you understand which questions must be answered, when objections may be appropriate, how undertakings are managed, and how to prepare effectively.
