Last Updated: August 22 2026
In an Ontario civil case, what evidence is considered relevant and must be disclosed during discovery?
In Ontario civil litigation, a paralegal will help you assess evidence relevance by checking whether it has a logical connection to a fact or issue in dispute, meaning it makes a material proposition more or less likely than it would be without the evidence, and that relevance also guides what you must disclose in discovery even if it may not be admissible at trial; under the Rules of Civil Procedure, documents relevant to any matter in issue that were in a party’s possession or control generally must be disclosed R.R.O. 1990, Regulation 194, s. 30.02, and in Small Claims Court the focus is often on documents served to the other parties at least 30 days before trial unless the judge orders otherwise O. Reg. 258/98, s. 18.02, with courts confirming relevance is a common-sense logic test Algarawi v. Berger; and Porter v. Sutandar, 2023 ONSC 2339; for help reviewing your documents or witness materials for discovery and trial, contact Bulat Paralegal Service at (705) 664-0334.
Add this website to Google Preferred Sources
Determining What Evidence Is Relevant
The relevance and admissibility of evidence, whether it is in the form of testimony or documents, in civil litigation proceedings is determined by assessing whether there is a logical link between the evidence and the facts and issues in dispute. The relevance of a document will also be used to determine if the document is discoverable and must be shared with other dispute litigants.
Note: Please contact Bulat Paralegal Service by phone at: (705) 664-0334 to discuss any specific questions that you may have.
The Law
The Rules of Civil Procedure, R.R.O. 1990, Regulation 194, and the Rules of the Small Claims Court, O. Reg. 258/98, as well as common law including the Algarawi v. Berger; and Porter v. Sutandar, 2023 ONSC 2339, decision assist with the determination of whether evidence is relevant to litigation. Specifically, these laws state:
Written Statements, Documents and Records
18.02 (1) A document or written statement or an audio or visual record that has been served, at least 30 days before the trial date, on all parties who were served with the notice of trial, shall be received in evidence, unless the trial judge orders otherwise.
(2) Subrule (1) applies to the following written statements and documents:
1. The signed written statement of any witness, including the written report of an expert, to the extent that the statement relates to facts and opinions to which the witness would be permitted to testify in person.
2. Any other document, including but not limited to a hospital record or medical report made in the course of care and treatment, a financial record, a receipt, a bill, documentary evidence of loss of income or property damage, and a repair estimate.
[18] To be received at trial, evidence must be admissible, and the trial judge must not have exercised her discretion to exclude the evidence. To be admissible, evidence must be relevant and not subject to exclusion under any other rules of law or policy (for example, because of privilege).
[19] For evidence to be relevant, it must have some tendency as a matter of logic and human experience to make the proposition for which it is advanced more likely or less likely than the proposition would be in the absence of the evidence.[10] This is not a high bar.
[20] Determining relevance is an exercise in the application of experience and common sense.[11] Justice Doherty put it this way:
Relevance as explained in these authorities requires a determination of whether as a matter of human experience and logic the existence of "Fact A" makes the existence or non-existence of "Fact B" more probable than it would be without the existence of "Fact A". If it does then "Fact A" is relevant to "Fact B". As long as "Fact B" is itself a material fact in issue or is relevant to a material fact in issue in the litigation then "Fact A" is relevant and prima facie admissible.[12]
[21] Relevance on discovery is determined by the pleadings. If even one part of a document is relevant, it must be produced.[13] Every document relevant to any matter in issue in an action that is or has been in the possession, power, or control of a party to the action shall be disclosed.[14] A document may be produced for discovery because it is relevant notwithstanding that it may not be admissible at trial.[15] A person examined for discovery shall answer any proper question relevant to any matter in issue in the proceeding.[16]
Court Cases
Unlike litigation within the higher court, in Small Claims Court cases the use of hearsay evidence is permissible as per section 27 of the Courts of Justice Act, R.S.O. 1990, c. C.43, which expressly states:
Evidence
27 (1) Subject to subsections (3) and (4), the Small Claims Court may admit as evidence at a hearing and act upon any oral testimony and any document or other thing so long as the evidence is relevant to the subject-matter of the proceeding, but the court may exclude anything unduly repetitious.
Same
(2) Subsection (1) applies whether or not the evidence is given or proven under oath or affirmation or admissible as evidence in any other court.
Same
(3) Nothing is admissible in evidence at a hearing,
(a) that would be inadmissible by reason of any privilege under the law of evidence; or
(b) that is inadmissible by any Act.
Conflicts
(4) Nothing in subsection (1) overrides the provisions of any Act expressly limiting the extent to or purposes for which any oral testimony, documents or things may be admitted or used in evidence in any proceeding.
Copies
(5) A copy of a document or any other thing may be admitted as evidence at a hearing if the presiding judge is satisfied as to its authenticity.
Furthermore, and also unlike the evidence rules within the higher court, the Rules of the Small Claims Court are without a requirement to disclose all relevant evidence and instead require only the disclosure of evidence that may be relied upon at Trial. Specifically, the Rules of the Small Claims Court state:
Disclosure
13.03 (2) At least 14 days before the date of the settlement conference, each party shall serve on every other party and file with the court,
(a) a copy of any document to be relied on at the trial, including an expert report, not attached to the party’s claim or defence ...
Additionally, the Rules of the Small Claims Court are without a rule about whether an Order for production or inspection of potentially relevant evidence may be sought; and accordingly, for the answer to this question, careful review of the express Small Claims Court disclosure rules and previous case decisions becomes necessary.
Conclusion
The admissibility of evidence in court is contingent upon the relevancy of the evidence. If the evidence has a reasonable chance of proving or disproving a fact in dispute, then it may be admitted. Otherwise, it will considered irrelevant and invalid to the court proceedings.
NOTE: A significant amount of inquiries that include “lawyers near me” or “best lawyer in” typically indicate a pressing need for adept legal assistance rather than a particular job title. In Ontario, licensed paralegals are governed by the same Law Society that supervises lawyers and are empowered to assist clients in specific litigation issues. Advocacy, legal assessment, and procedural expertise are crucial to that function. Bulat Paralegal Service provides legal representation within its licensed framework, focusing on strategic placement, evidentiary development, and compelling advocacy designed to secure efficient and advantageous outcomes for clients.
