Definition
In Roman and civil law, a condictio (plural: condictiones) is a personal action — an action in personam — by which a plaintiff claims that the defendant is obligated to give or do a specific, defined thing or perform a specific service. The plaintiff asserts not a right in property but a right arising from an obligation: that something is owed and must be delivered.
The condictio is distinguished from the vindicatio rei, which is a real action — an action to vindicate one's right of property by reclaiming or retaining possession of a thing. The condictio does not rest on ownership; it rests on obligation. The plaintiff does not say "that thing is mine" but rather "that thing (or its value) ought to be given to me."
Within this general framework, specific subtypes addressed distinct circumstances:
1. Condictio indebiti — An action to recover money or property paid by mistake to a person who was not entitled to receive it, and which the paying party had no legal or equitable obligation to pay. The action did not lie if the obligation was natural (ex aequitate), or if the payer knew at the time that nothing was legally owed (on the principle that one who deliberately pays what is not due is presumed to make a gift).
2. Condictio causa data causa non secuta — An action to recover a benefit conferred in expectation of a return performance that never materialized.
3. Condictio ob turpem vel iniustam causam — An action to recover something transferred for an illegal or immoral consideration.
Common Confusion
The condictio is sometimes loosely equated with the modern restitution claim or unjust enrichment action, and the comparison is instructive but imprecise. Modern unjust enrichment doctrine draws heavily on the condictio indebiti in particular, but the Roman framework was more rigidly typed: each condictio had defined conditions and a defined object. Modern restitution is a broader, more flexible doctrine that absorbed the function of multiple condictiones without preserving their formal distinctions. Researchers treating them as identical will misread historical civil law sources.
The condictio should also be distinguished from the actio in factum, which lay where no established form of action fit the circumstances — the condictio, by contrast, presupposed an established obligation.
Recognized Forms
/SUBTYPES
The major recognized condictiones in classical Roman law include:
- Condictio indebiti: recovery of mistaken payment
- Condictio causa data causa non secuta (also condictio ob causam datorum): recovery where an anticipated basis for a transfer failed
- Condictio ob turpem causam: recovery where consideration was immoral or illegal
- Condictio sine causa: a residual action for recovery where no valid cause existed for the defendant's retention
- Condictio furtiva: an action against a thief for the value of stolen property
Why It Matters in Research
The condictio is a gateway term for research in Roman law, civil law jurisdictions, and the historical foundations of common law restitution and quasi-contract.
Several navigational traps arise in corpus research:
First, historical sources use condictio both as a generic label (any personal obligation action) and as a specific label for individual subtypes. Burrill and Bouvier both reflect this ambiguity. When a source says "condictio," a researcher must determine from context whether the author means the general category or a specific subtype — the condictio indebiti in particular is often referenced simply as "condictio" in older texts.
Second, the condictio indebiti has a direct doctrinal descendant in modern law: the action for money had and received in common law, and unjust enrichment claims broadly. Researchers tracing the intellectual genealogy of restitution doctrine will find the condictio indebiti at the root. But civil law systems (Louisiana, Quebec, Scotland, South Africa) preserved the condictio framework more explicitly than common law systems, so jurisdictional context heavily affects how the term functions in a given source.
Third, the term condictitia actio appears as a synonym in some sources (Burrill notes this usage, citing the Institutes). Researchers using full-text search should include this variant.
Fourth, the Justinianic Institutes (3.15 and 4.6) are the primary historical reference points cited by Black's, Bouvier, and Burrill. Any source invoking condictio without reference to those provisions should be examined for whether it is accurately applying Roman doctrine or using the term loosely as a civilian ornament.
Historical Dictionary Support
The four source dictionaries agree on the core definition: condictio is a personal action founded on an obligation to give or do a certain, defined thing, distinguished from real actions (vindicatio). All four cite or paraphrase the Institutes.
Bouvier is the most expansive, providing both the generic definition and a detailed treatment of the condictio indebiti, including the limitation that the action does not lie where payment was made knowingly (citing the maxim qui consulto dat quod non debetur prasumitur donare — one who deliberately pays what is not owed is presumed to make a gift). Bouvier also references Bell's Dictionary and Calvinus's Lexicon, situating the term in the broader civilian reference tradition.
Burrill adds the important point that condictio is etymologically and procedurally rooted in the concept of summoning or giving notice (condicere, to summon or denounce), and provides the Latin formula from the Institutes: "dicimus condictionem actionem in personam esse, quâ actor intendit dari sibi oportere" — we call a condictio a personal action in which the plaintiff intends that something ought to be given to him. This formula is useful for understanding precisely what the plaintiff was asserting.
Black's (both editions) provides the cleanest brief definition but omits the subtypes entirely, which is a significant gap for researchers who need to understand the taxonomy. Bouvier remains the most useful starting point among the shelf sources for substantive research on condictio doctrine.
None of the shelf sources address the condictio's influence on common law quasi-contract in any systematic way — that connection must be pursued through secondary literature and encyclopedia sources.
Jurisdictional Note
The condictio remains operative terminology in civil law jurisdictions. Louisiana, Quebec, Scotland, and South Africa each preserve variants of condictio doctrine in their private law systems, and the term appears in their jurisprudence and scholarly commentary. In common law jurisdictions, the functional equivalents — money had and received, unjust enrichment, restitution — have displaced the Roman terminology, though scholarly writing on restitution regularly invokes the condictio framework for historical grounding.
Encyclopedia Cross-Reference
See Law Mind Encyclopedia: Unjust Enrichment; Roman Law in Civil Jurisdictions; Quasi-Contract.