examinations for discovery explained

Examination for Discovery in Ontario: What to Expect, How to Prepare, and Why It Matters

Date: June 8, 2026

The examination for discovery is one of the most consequential stages of civil litigation in Ontario. It takes place before trial, under oath, and everything you say can be used against you at trial. For many parties, it is also the first time they face sustained questioning about the facts of their case from opposing counsel. Going in without preparation is one of the most costly mistakes a litigant can make.

This article explains what an examination for discovery is, how it works under Ontario's Rules of Civil Procedure, what questions you can expect, how to prepare, and what happens to your answers. Whether you are a plaintiff, defendant, or a corporate representative being examined on behalf of your organization, understanding the process in advance is essential to protecting your position.

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 takes place after pleadings are exchanged and documents are produced.

The purpose is to clarify the issues in dispute, assess the strengths and weaknesses of each side's case, obtain admissions, and narrow down what evidence will be presented at trial. Everything said at discovery is recorded and can be used at trial. Inconsistent answers between discovery and trial can be used to challenge your credibility.

Where discovery fits in the litigation process

An examination for discovery does not happen at the beginning of a lawsuit or immediately before trial. It occurs in the middle phase of litigation, after the parties have exchanged their pleadings (statements of claim, statements of defence, and any replies) and after each party has served their affidavit of documents listing the documents in their possession relevant to the case.

Understanding where discovery sits in the overall sequence helps you understand its purpose. By the time discovery happens, each side knows the general shape of the other's case from the pleadings. Discovery is the opportunity to probe the details, test the evidence, and identify the specific facts and documents that will matter at trial. What is revealed at discovery frequently determines whether the case settles and on what terms.

For an overview of the full litigation process and how the statement of defence and other pleadings fit into it, see our related guides.

What happens at an examination for discovery

A standard oral examination for discovery in Ontario follows a defined structure. Understanding each component reduces the anxiety of the unfamiliar and helps you focus on what matters: the substance of your answers.

1

The oath or affirmation

Before any questions are asked, you will be asked to swear an oath or make a solemn affirmation that your answers will be truthful. From this point forward, every answer you give is under oath with the same legal significance as testimony at trial. Deliberately false answers can constitute perjury.

2

Questions from opposing counsel

The opposing party's lawyer asks the questions. They can ask about any matter relevant to any issue in the proceeding, including facts alleged in the pleadings, documents produced or referred to, the identity of potential witnesses, and whether additional documents may exist. The scope is broad: relevance, not materiality, is the standard at discovery.

3

Objections by your lawyer

Your lawyer will be present throughout and can object to questions that are improper, irrelevant, or seek privileged information such as legal advice. If your lawyer objects and the parties cannot resolve the dispute, the question may be referred to a court officer or judge for a ruling. You do not answer a question that your lawyer has objected to until the objection is resolved.

4

Undertakings

When you cannot answer a question immediately because you do not have the information at hand, you may give an undertaking: a formal commitment to provide the information after the examination. Undertakings are tracked and must be fulfilled within a reasonable time. Failing to fulfil undertakings can result in court orders compelling compliance and cost awards against you.

5

The transcript

The entire examination is recorded by a court reporter and transcribed. The transcript is a formal legal document. Either party can use admissions or statements from the transcript at trial. If your answers at trial differ from what you said at discovery, the opposing party can read the discovery transcript to the court to challenge your credibility.

What questions are asked at discovery

The scope of questioning at an examination for discovery is broad. Rule 31.06 of Ontario's Rules of Civil Procedure allows a party to be examined on any matter relevant to any matter in issue in the action. In practice this means the questioning covers a wide range of topics, including:

Background and role Questions about your background, your role in the organization or transaction at issue, your responsibilities, and how you came to be involved in the events that gave rise to the litigation.
The facts in the pleadings Detailed questioning about the facts alleged in the statements of claim and defence, including your firsthand knowledge of those events, what you saw, heard, or did, and when.
Documents and correspondence Questions about specific documents in the affidavit of documents, emails, contracts, and other records. You may be asked to identify documents, explain their context, and confirm or deny their contents.
Witnesses Questions about other individuals who have knowledge of the relevant events: who they are, what they know, and how they are connected to the facts in dispute.
Additional documents Questions designed to identify whether additional documents exist that have not yet been produced, including documents that may be in the possession of third parties.
Damages In claims where the amount of loss is in dispute, detailed questions about how damages are calculated, what losses were suffered, and what steps were taken to mitigate them.
The examining lawyer is entitled to ask questions even if they do not know whether the answers will be helpful to their case. Discovery is an information-gathering exercise, not just a series of traps. The questions that appear straightforward are often the most consequential, because the answers become part of the formal record of your position.

How to answer questions at discovery

The manner in which you answer questions at discovery is as important as the substance of your answers. A witness who is well-prepared, calm, and precise is significantly harder to challenge at trial than one who rambles, volunteers information, or appears uncertain about facts they should know.

Listen to the full question before answering

Do not begin answering before the question is finished. The question may be longer or more specific than it initially appears, and starting to answer before you have heard all of it leads to incomplete or misdirected responses. Take a breath and make sure you understand what is being asked.

Answer only what was asked

Discovery is not a conversation. Answer the question asked and stop. Volunteering additional information gives the opposing party material they did not ask for and may not have found otherwise. If the question can be answered with a yes or no, answer with a yes or no. If it requires explanation, provide the explanation and then stop.

Be honest, including about what you do not know

If you do not remember, say so. If you do not know, say so. "I don't recall" is a complete and legitimate answer when it is true. It is far less damaging than guessing incorrectly or giving an answer that is later contradicted by documents. What you cannot say is something you know to be false.

Ask for clarification when needed

If a question is unclear or ambiguous, ask for it to be clarified before you answer. You are entitled to understand what is being asked. Answering an ambiguous question based on your interpretation of it can create problems if the questioner meant something different.

Pause before answering to give your lawyer time to object

After a question is asked, a brief pause before you answer gives your lawyer the opportunity to object if the question is improper. Do not begin answering the moment the question ends. This disciplined approach protects you from answering questions that should not have been asked.

Stay calm and do not argue

The examining lawyer may ask the same question multiple ways, push back on your answers, or adopt an aggressive tone. None of this requires you to change an accurate answer or become defensive. Remain calm, stick to what you know to be true, and let your lawyer manage any procedural issues that arise.

Discovery is approaching and you have not yet prepared with your lawyer?

Preparation sessions with your lawyer before discovery are not optional. The documents you review, the questions you rehearse, and the strategy you develop for managing difficult areas of questioning directly affect your credibility at trial. Contact Achkar Law now.

Call: 1-800-771-7882 Speak With a Civil Litigator

Virtual examinations for discovery

Since 2020, the majority of examinations for discovery in Ontario have been conducted by videoconference. Virtual discovery is now standard practice and is treated with the same formality and legal significance as an in-person examination. The oath, the recording, the transcript, and the admissibility of answers at trial are all identical whether the examination takes place in a boardroom or on screen.

Practical preparation for a virtual discovery includes: testing your device, camera, and microphone in advance; having your affidavit of documents and all produced documents organized and accessible on screen or in hard copy; participating from a quiet, private location free from interruptions; closing unnecessary programs and silencing notifications during the examination; and speaking clearly and at a measured pace, since the court reporter is transcribing everything.

One practical advantage of virtual discovery is that you can have documents organized and visible on a second screen without the physical awkwardness of shuffling paper. Prepare your document organization before the examination so you can locate specific records quickly when they are referred to in questions.

Examinations involving corporations

When a corporation is a party to litigation, the opposing party is entitled to examine a representative of the corporation rather than the corporation itself. Under Rule 31.03 of Ontario's Rules of Civil Procedure, the corporation designates the officer, director, or employee who will be examined.

The designated representative is examined on behalf of the corporation, meaning their answers bind the corporation in the proceeding. This creates significant responsibility: the person examined must have sufficient knowledge of the relevant matters to answer meaningfully, and may need to inform themselves about matters within the corporation's knowledge before attending.

The examining party can challenge the designation if the person chosen does not have adequate knowledge. In some cases, the examining party is entitled to examine more than one corporate representative on different subject matters. Corporations facing discovery should work closely with litigation counsel to select and prepare the appropriate representative.

Approaching an examination for discovery in Ontario or BC?

Thorough preparation with your lawyer is the single most important thing you can do before discovery. Achkar Law represents individuals and businesses in civil and commercial litigation across Ontario and BC, including discovery preparation and representation.

Speak With a Civil Litigator Or call us: 1-800-771-7882

How discovery affects trial strategy and settlement

What happens at discovery does not stay at discovery. The admissions made, the documents identified, and the credibility of the witnesses assessed during examinations directly shape what happens at trial and significantly affect the settlement dynamics of the case.

A strong discovery performance by a party can substantially improve their settlement position: if the other side has obtained fewer admissions than expected and identified fewer damaging documents, their confidence about the outcome of trial decreases. The reverse is equally true. Parties who perform poorly at discovery, who make damaging admissions, or whose documents tell a story that contradicts their pleadings frequently find themselves in a weaker negotiating position.

This is why experienced litigators treat discovery preparation as an investment in the entire outcome of the case, not just a procedural hurdle to clear.

Practical takeaways

An examination for discovery is a pre-trial procedure under Rule 31 of Ontario's Rules of Civil Procedure where each party's lawyer questions the opposing party under oath. Everything said is recorded and can be used at trial.
Answer only what was asked. Do not volunteer information beyond the question. Brevity and precision are your most effective tools at discovery.
Inconsistent answers between discovery and trial will be used to challenge your credibility. Accuracy and consistency matter more than any individual answer being favourable.
Undertakings made at discovery must be fulfilled. Failing to do so can result in court orders and cost awards. Track every undertaking and follow up promptly after the examination.
Corporate representatives bind the corporation with their answers. Selecting and preparing the right person to be examined is a critical strategic decision for any corporate party.
Virtual discovery is standard practice and carries the same formality and legal consequences as in-person examination. Prepare your technology and documents with the same care as you would for a boardroom session.

Frequently asked questions

What is an examination for discovery in Ontario?

An examination for discovery is a pre-trial procedure in Ontario civil litigation governed by Rule 31 of the Rules of Civil Procedure. Each party's lawyer questions the opposing party under oath before trial. The purpose is to clarify the issues, assess the strengths and weaknesses of each side's case, obtain admissions, and narrow down what evidence will be presented at trial. Everything said at discovery is recorded and can be used at trial.

What types of questions are asked at an examination for discovery?

Questions typically cover the party's background and role in the relevant events, the facts alleged in the pleadings, documents and correspondence in the case, potential witnesses, whether additional documents exist, and the calculation of damages. The examining lawyer can ask about any matter relevant to any issue in the proceeding, and the scope is broader than what will ultimately be admissible at trial.

Can discovery answers be used against you at trial?

Yes. Everything said at an examination for discovery is under oath and transcribed. Admissions made at discovery can be used at trial. If your answers at trial are inconsistent with your discovery testimony, the opposing party can use the discovery transcript to challenge your credibility before the court. This is why accurate and consistent answers at discovery are essential.

What is an undertaking at an examination for discovery?

An undertaking is a formal commitment made during discovery to provide information or documents that cannot be provided immediately. When you give an undertaking, you are promising to follow up with the requested information within a reasonable time. Failing to fulfil undertakings can result in court orders compelling compliance and cost awards against the party who gave them.

Who can be examined on behalf of a corporation in Ontario?

Under Rule 31.03 of Ontario's Rules of Civil Procedure, a corporation designates an officer, director, or employee to be examined on its behalf. The designated representative's answers bind the corporation. The examining party can challenge the designation if the person chosen lacks adequate knowledge, and may be entitled to examine more than one representative on different subject matters.

How should I prepare for an examination for discovery in Ontario?

Preparation should include reviewing all pleadings, your affidavit of documents, and every document produced in the proceeding; meeting with your lawyer to review likely questions and practice answering them; understanding the key facts and identifying areas where your evidence may be challenged; and preparing to answer honestly, concisely, and without volunteering information beyond what was asked. Preparation sessions with your lawyer are not optional.

Approaching an examination for discovery? Preparation makes the difference.

The difference between a well-prepared and an unprepared discovery witness is often the difference between a strong case and a weak one. Achkar Law represents individuals, businesses, and organizations across Ontario and British Columbia in civil and commercial litigation, including discovery preparation, representation at examinations, and post-discovery strategy. We will prepare you thoroughly for what to expect and how to protect your position throughout the process.

Call us at 1-800-771-7882 or fill out the form below and we will be in touch.