Definition
In Roman and civil law, an actio specialis (literally, "special action") is an action brought to enforce the delivery or recovery of a specific, identified thing or things — as opposed to a general or personal action seeking a sum of money or the performance of an obligation. The remedy is directed at the res itself: the plaintiff claims entitlement to a particular object and demands its return or transfer, not a substitute or equivalent value.
The term stands in contrast to actio in personam and to broader remedial categories, and it corresponds most closely in function to what common law systems would recognize as a real action or an action in rem — though the mapping is imperfect.
Why It Matters in Research
Researchers encountering actio specialis in primary or secondary sources are almost always working in one of three contexts: (1) Roman law texts and their medieval glosses, (2) civil law treatises of the 18th and 19th centuries applying Roman categories to continental or mixed-jurisdiction practice, or (3) American and English legal dictionaries of the 19th century that borrowed civil law terminology to explain concepts without clean common law equivalents.
The key navigational trap is assuming this term maps cleanly onto modern common law doctrine. It does not. Common law absorbed some of the functional logic of the actio specialis through real property actions and specific performance in equity, but the Roman procedural category itself did not survive as a living doctrine in common law jurisdictions. When Burrill cites the term, he is offering it as a comparative reference point, not as operative American law.
Researchers working in Louisiana, Quebec, or other mixed civil law jurisdictions should treat the term as potentially operative — those systems retained civilian action categories more directly. In those contexts, the distinction between special and general actions may still carry doctrinal weight in historical materials.
The Digest citation (Dig. 6.1.1) points to the vindicatio — the foundational Roman action for recovering ownership of a specific thing. That anchor is important: actio specialis in its classical use is tightly connected to the law of property and ownership, not contract or obligation. If a source uses the term in a contractual or obligational context, that is a potential anachronism or loose usage worth flagging.
Historical Dictionary Support
Burrill's Law Dictionary provides the only direct entry among the Law Mind shelf sources. His definition is compact and reliable: "a special action; an action brought to enforce the delivery of one or several single things," with a dual citation to Mackeldey's Civil Law and the Digest. This is characteristic of Burrill's method — he imports civilian terminology with enough citation to allow the researcher to trace the source, without extended analysis.
Mackeldey's Compendium of Modern Civil Law (the work Burrill cites as "1 Mackeld. Civ. Law") was a widely used 19th-century treatise that systematized Roman law for the common law audience. Its treatment at § 196 situates actio specialis within the broader taxonomy of Roman actions, which is the proper framework for understanding the term. Researchers who want to go deeper than Burrill should go directly to Mackeldey, and from there to the Digest.
No entry appears in Black's, Bouvier's, or other standard common law dictionaries in the Law Mind corpus, which itself signals something: the term was used by civilian-oriented compilers like Burrill but was not considered sufficiently operative in common law practice to warrant broader treatment. Its absence from Black's is informative.
Jurisdictional Note
Actio specialis carries live doctrinal relevance primarily in civil law and mixed jurisdictions — Louisiana, Quebec, and South African law among them — where the Roman law taxonomy of actions remained influential. In pure common law jurisdictions, the term appears in historical and comparative contexts only and should not be treated as having operative procedural meaning in modern practice.