Definition
Actio non ulterius (Latin: "action no further") is a technical term from English common law pleading referring to the distinctive clause inserted in a plea to the further maintenance of the action. When a defendant wished to raise a new defense arising after the original pleading — a defense that had not existed at the commencement of the suit but had since come into being — the plea carrying that defense contained a clause asserting that the plaintiff should not further maintain the action. That clause was known as the actio non ulterius clause. The plea itself, in which this clause appeared, superseded the earlier procedure known as the plea puis darrein continuance.
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Common Confusion
ACTIO NON ULTERIUS vs. PLEA PUIS DARREIN CONTINUANCE: These are not the same thing. The plea puis darrein continuance was the earlier procedural device by which a defendant raised a new matter arising after the last continuance. The actio non ulterius clause is specifically associated with the reformed plea that replaced puis darrein continuance in English practice. Researchers working across different historical periods may encounter both forms and should not treat them as interchangeable; the actio non ulterius formulation reflects a later stage in the development of common law pleading procedure.
ACTIO NON ULTERIUS vs. ACTIO NON: A separate Latin pleading term, actio non, appears in the body of a plea in bar and signals the defendant's general denial of the plaintiff's right to maintain the action at all. It is a standard formal clause in a plea in bar, not a clause responding to new matter arising after commencement of suit. The two terms sound similar and address the plaintiff's right to proceed, but they operate at different procedural moments and serve distinct functions.
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Why It Matters in Research
This term is a marker of English common law pleading at a specific historical moment. Researchers working in pre-reform English legal materials — particularly records and treatises from before the common law pleading reforms of the nineteenth century — will encounter this clause as a signpost that the defendant is raising a supervening defense, one that arose after the suit began. Its presence tells you something important about the posture of the case: the underlying litigation had already been commenced and was ongoing when the new defensive matter emerged.
The term essentially disappears from active use after the procedural reforms that dismantled the technical common law pleading system in England (the Judicature Acts, 1873–1875) and the parallel reforms in American jurisdictions through code pleading and later the Federal Rules of Civil Procedure. Researchers in modern practice will not encounter it in live litigation, but it will surface in historical case records, older treatises on pleading, and nineteenth-century legal encyclopedias.
A key research trap: Black's 2nd Edition entry for this term is fragmentary in surviving sources, cutting off mid-entry. Bouvier's is more complete. Researchers should not assume Black's silence or truncation indicates the term was absent from practice; rather, consult Stephens on Pleading (cited by Bouvier) for the fuller common law treatment.
The corpus connection to run alongside this term is the broader pleading literature — particularly treatises on special pleading — which will give the procedural context that the dictionary entries alone do not supply.
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Historical Dictionary Support
Bouvier and Black's 2nd Edition agree on the core identification: actio non ulterius names the distinctive clause in the plea to the further maintenance of the action, and both connect it to the supersession of the plea puis darrein continuance. Bouvier's entry is the more useful of the two, as Black's 2nd Edition entry is truncated.
Bouvier cites Stephen's Principles of Pleading (Steph. Pl. 64, 65, 401) as the authoritative source for the procedural context. That citation is genuinely instructive: Stephen's Principles of Pleading was the leading English treatise on common law pleading and is the source a researcher should consult to understand not just the clause but the procedural architecture surrounding it.
Neither dictionary entry provides meaningful substantive analysis beyond identification and cross-reference. Both treat this as a term of art requiring the reader to already understand the pleading system it inhabits. The historical dictionaries are adequate for locating the term but not for understanding it; the treatise literature does the real explanatory work.
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Jurisdictional Note
This term belongs to English common law pleading and its American common law counterparts prior to procedural reform. American jurisdictions that adopted code pleading in the mid-nineteenth century effectively retired the technical pleading forms in which this clause operated. It has no live jurisdictional variation in modern practice.
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