Per Curiam Opinion

A per curiam opinion (Latin for "by the court") is a ruling issued in the name of the entire court rather than under the byline of an individual judge. The practice is most associated with appellate bodies in common-law jurisdictions, including the U.S. Supreme Court, U.S. Courts of Appeals, the Supreme Court of Canada, and the European Court of Human Rights, though equivalents exist in other systems.

Courts typically use the per curiam form in three situations:

• Routine or uncontroversial dispositions, where the legal question is considered settled and a brief unsigned order suffices.
• Summary reversals or affirmances without full briefing or oral argument, often to correct a clear lower-court error.
• Politically sensitive cases where the court wishes to project institutional unanimity and minimize the visibility of any single justice.

The form does not necessarily imply unanimity. Per curiam opinions can be accompanied by concurrences and dissents, and may be lengthy and substantive. A prominent U.S. example is Bush v. Gore (2000), which resolved the contested presidential election through a per curiam opinion despite sharp internal disagreement. New York Times Co. v. United States (1971), the Pentagon Papers case, was likewise decided per curiam, with each justice writing separately.

For researchers and Model UN delegates analyzing judicial behavior, per curiam opinions present interpretive challenges. Because authorship is not disclosed, attribution must be inferred from style, voting patterns, or later disclosures. Scholars studying judicial polarization sometimes treat heavy reliance on the form as a signal of institutional strain or, conversely, of efforts to preserve collegiality.

In international tribunals, unsigned or collective judgments are the norm rather than the exception — the International Court of Justice, for instance, issues a single judgment of the Court, though individual judges may append separate or dissenting opinions under Article 57 of the ICJ Statute.