In the context of civil class action litigation, “ascertainability” includes the identification of individuals who qualify for class membership. Although not an explicit Rule 23 requirement, since the U.S. Court of Appeals for the Third Circuit's decision in
Will Ascertainability Split Finally Be Resolved?
Despite requests for change, the Judicial Conference Advisory Committee on Civil Rules declined to include ascertainability in its proposed changes to Rule 23. In addition, the U.S. Supreme Court recently rejected two petitions for certiorari earlier this year that would have addressed ascertainability.

This premium content is locked for LawJournalNewsletters subscribers only
ENJOY UNLIMITED ACCESS TO THE SINGLE SOURCE OF OBJECTIVE LEGAL ANALYSIS, PRACTICAL INSIGHTS, AND NEWS IN LawJournalNewsletters
- Stay current on the latest information, rulings, regulations, and trends
- Includes practical, must-have information on copyrights, royalties, AI, and more
- Tap into expert guidance from top entertainment lawyers and experts
Already have an account? Sign In Now
For enterprise-wide or corporate access, please contact Customer Service at [email protected] or call 1-877-256-2473.






