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February 9, 2026Canadian Class Action Review0 citations

Case Review of Decertification Motions in Class Proceedings

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MOMelanie Ouanounou

Key Points

  • This article examines the criteria for decertification in class proceedings and recent case applications in Canada.
  • Reviewed recent decertification motions in class proceedings in Canada.
  • Analyzed instances where new evidence influenced decertification decisions.
  • Highlighted alternative judicial measures taken when decertification was not granted.
  • Identified successful decertification motions based on new evidence or developments.
  • Annotated cases where courts opted for alternatives instead of granting decertification.
  • Showed varying judicial approaches to address defendant concerns in class actions.

Abstract

Abstract: This article provides an overview of the test for decertification and reviews recent instances in which decertification motions have been successfully used in Canada where new evidence, subsequent facts, or developments have arisen after certification. It will also highlight certain cases where courts, instead of granting decertification, have adopted alternative measures to address the concerns raised by the defendants.

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Cite This Study

Melanie Ouanounou (2018) studied this question.

synapsesocial.com/papers/69897a06f0ec2af6756e82b2https://doi.org/10.3138/ccar.v13i1.015
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Palpable and Overriding Confusion: Appellate Review of Certification Orders in Canada2011
  2. 2Class Actions in Canada: Conflicting Purposes and Unpredictable Outcomes2013
  3. 3Pre-Certification Motions that Dispose of or Limit the Issues at Trial: Six Factors for Judges to Consider2022
  4. 4To Certify or not to Certify: Third Parties, Necessary Parties, and the Certification of Class Actions in Common Law Canada2023
  5. 5Early Disposition or Prejudicial Attrition? An Analysis of Bill 161 and Pre-Certification Dispositive Motions in Class Actions2022