Paralegal Certification PrepLegal Terminology and ConceptsMedium

A paralegal is summarizing the concept of 'res judicata' for a new legal intern. The intern is struggling to understand when a claim can be re-litigated. Which of the following statements accurately explains the core principle of res judicata?

  1. AIt allows a higher court to review a lower court's decision for errors of law.
  2. BIt ensures that similar cases are decided in a similar manner based on prior judicial decisions.
  3. CIt requires all parties to a lawsuit to disclose all relevant information to each other.
  4. DIt prevents the same parties from re-litigating the same claims that have already been finally decided by a competent court.
Show answer & explanation

Correct answer: D. It prevents the same parties from re-litigating the same claims that have already been finally decided by a competent court.

Res judicata, also known as claim preclusion, prevents parties from re-litigating claims that have already been decided on the merits by a court of competent jurisdiction.

Why the other options are wrong

  • A. This describes appellate review, not res judicata.
  • B. This describes the principle of stare decisis (precedent), not res judicata.
  • C. This describes the discovery process in litigation.

Res Judicata

A legal doctrine meaning 'a matter judged,' which prevents the same parties from re-litigating claims that have already been decided on the merits by a court of competent jurisdiction.

  • Also known as claim preclusion.
  • Requires a final judgment on the merits.
  • Applies to the same parties and the same claims.

Memory trick: Preclusion stops repeat performances in court.

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