Definition
Latin phrase meaning "for dividing a thing held in common." In Roman and civil law, de communi dividundo was the name of a specific legal action by which co-owners of property could compel a partition — that is, a formal division of jointly held property so that each co-owner received a distinct, separately held share. The action was directed not merely at dissolving the common ownership but at achieving an equitable allocation of the thing held in common among all parties with a share in it. Where physical division of the property was impossible or impractical, the action could result in a monetary adjustment (the actio communi dividundo could also address accounting for fruits, expenses, and improvements among co-owners). The phrase appears in Roman law sources as a procedural label identifying the type of claim being brought — partition — rather than describing a substantive right in isolation.
Common Confusion
De communi dividundo is sometimes conflated with two related but distinct Roman law actions: the actio familiae erciscundae (for dividing an inheritance among co-heirs) and the actio finium regundorum (for settling boundaries between neighboring landowners). Classical Roman jurists grouped these three as the "double actions" (actiones duplices or iudicia duplicia) in which each party simultaneously held the role of plaintiff and defendant — no party was purely the claimant, and any party could receive an award against any other. Researchers reading civilian sources should not assume that de communi dividundo applies to inherited estates or boundary disputes; those carried their own distinct procedural labels.
Why It Matters in Research
This term appears almost exclusively in civil law contexts and in common law sources that draw directly on civilian or Roman law tradition. Researchers will encounter it primarily in:
— Medieval English legal treatises. Bracton and Fleta both reference the term, borrowing it directly from the civil law to describe partition-like proceedings. Because English common law developed its own distinct partition remedies (the writ of partition, later statutory partition actions), the Roman label de communi dividundo in these English sources signals that the author is reasoning by analogy from civil law rather than describing operative English procedure. Do not read these references as evidence that the Roman action itself was available in English courts.
— Civil law jurisdictions. In Louisiana, Quebec, and jurisdictions drawing on Spanish or French civil codes, the concept underpinning de communi dividundo remained procedurally live far longer than in common law states. Researchers working in these jurisdictions should trace the term forward into codified partition law rather than treating it as purely historical.
— Comparative law and treatise literature. The term frequently surfaces in 18th- and 19th-century Anglo-American treatises that compare English equity's partition jurisdiction with its Roman antecedents. Mackeldey's Roman Law (cited in both editions of Black's) is the standard reference point in these discussions.
The structural pattern of this term — a Latin procedural label with no operative common law counterpart — means it rarely appears in case law directly but often appears in headnotes, treatise footnotes, and digests as a shorthand for the underlying concept of co-ownership partition. A researcher who encounters it in an index or digest should understand it as pointing toward partition doctrine broadly, not toward a surviving Roman cause of action.
Historical Dictionary Support
The historical dictionaries are in close agreement on the core definition: a Latin phrase designating the civil law action for dividing property held in common. Burrill's entry is the most detailed, citing the Institutes (4.6.20 and 4.17.5), Bracton (fol. 443b), and Fleta (lib. 5, c. 9, § 1), giving researchers a direct path to primary civil law and medieval English sources. Both editions of Black's rely on Mackeldey's Roman Law (§ 499) as the authoritative secondary reference. The dictionaries collectively treat this as a straightforward definitional entry — none attempts to trace how the concept was absorbed (or rejected) by common law courts, which is the more important research question for practitioners working in English-language archives. The cross-reference in Burrill's to "Communi dividundo" (without the "de") is useful: researchers should check both headings in older digests and indices, as the phrase was cited with and without the preposition depending on the source's indexing convention.
Jurisdictional Note
In common law jurisdictions, this term is historical and has no operative procedural significance; partition is governed by statute and equity rules that displaced the Roman action entirely. In civilian jurisdictions, particularly Louisiana, the underlying right to compel partition from co-owners remains codified and procedurally active, though the Latin label itself has given way to statutory language.