Definition
Furtum conceptum is a category of theft recognized in Roman civil law. It denotes the specific offense established when stolen goods are discovered in a person's possession during a formal search conducted in the presence of witnesses. The person found in possession was liable under this form even if they were not the original thief — the act of receiving and concealing stolen property, when exposed through witnessed search, constituted a distinct actionable wrong.
The term belongs to a Roman law taxonomy that divided theft (furtum) into several recognized types based on the circumstances of commission or detection. Furtum conceptum addresses the moment of discovery rather than the act of taking, capturing what modern law would recognize as a hybrid of receiving stolen property and possession of stolen goods.
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Common Confusion
Furtum conceptum is frequently confused with furtum manifestum (theft caught in the act) and furtum oblatum (theft passed off onto another). These are related but distinct categories. Furtum manifestum applied when a thief was caught in the commission of the act, carrying the harshest penalties in classical Roman law. Furtum oblatum applied when stolen goods were transferred to a third party specifically so that they would be found there. Furtum conceptum, by contrast, attaches regardless of the possessor's role in the original theft — the witnessed discovery of stolen property in one's possession is sufficient. Burrill's formulation makes this clearest: the offense arises from the formal search and finding, not from the act of stealing.
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Recognized Forms
/SUBTYPES
Roman law recognized at least four principal forms of furtum, of which furtum conceptum is one:
FURTUM MANIFESTUM — theft detected in the act; the thief caught red-handed. Attracted the most severe penalties under the Twelve Tables.
FURTUM NEC MANIFESTUM — theft not caught in the act; detected later through evidence or accusation.
FURTUM CONCEPTUM — stolen goods discovered through formal, witnessed search on a person's premises or person.
FURTUM OBLATUM — stolen goods deliberately placed with another so as to be found there; the person who transferred the goods remained liable despite not being found in possession.
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Why It Matters in Research
Researchers encountering furtum conceptum in historical sources should understand that this is not a general Latin synonym for theft. It is a technical classification within Roman law's highly structured taxonomy of furtum. Its significance in the common law tradition is primarily doctrinal and comparative — English treatise writers and common law scholars, particularly from the seventeenth through nineteenth centuries, drew on Roman law categories when theorizing about receiving stolen property and the liability of possessors.
The conceptual architecture matters for research in two ways. First, when furtum conceptum appears in a common law treatise or digest, it usually signals a comparative argument about the treatment of receivers and possessors — the author is reaching to Roman authority to support or critique a common law rule. Second, the formal search requirement (testibus præsentibus — in the presence of witnesses) has no precise common law analogue, which means translations that render furtum conceptum simply as "receiving stolen goods" are imprecise and may flatten an argument the original author was making about procedural formality and proof.
Corpus researchers should note that Bouvier's Law Dictionary, despite being listed as a source, does not contain a useful entry on this term — the text attributed to it in the source material is plainly misfiled and concerns maritime equipment (ship-chandler's supplies). This is a reminder that historical dictionary compilations contain errors of attribution and organization, and a missing or incoherent entry in one source does not indicate that the term was not recognized at the time.
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Historical Dictionary Support
Black's and Rapalje & Lawrence converge on the same core definition: furtum conceptum is the theft established when stolen property is discovered on a searched person in the presence of witnesses. Both reproduce or reference the same Roman law maxim from Coke's Institutes (3 Inst. 107): Furtum est contrectatio rei alienæ fraudulenta, cum animo furandi, invito illo domino cujus res illa fuerat — "Theft is the fraudulent handling of another's property, with an intention of stealing, against the will of the proprietor, whose property it was." This maxim is the classical Roman definition of furtum generally, not specifically of the conceptum subtype, but its citation here grounds the term in the broader theft framework.
Burrill's adds substantive depth by citing the Institutes of Justinian (Inst. 4.1.4) directly and providing the Latin formula for the offense: conceptum furtum dicitur cum apud aliquem, testibus præsentibus, furtiva res quæsita et inventa sit. This is the most technically complete of the historical definitions. Burrill also characterizes furtum conceptum as "received theft" and the "offence of receiving stolen goods," a translation that is useful but slightly imprecise — it collapses the procedural discovery element into a substantive characterization.
Historical sources are in agreement on the essentials and diverge only in depth of treatment. None of the available historical dictionaries substantively addresses the penalties associated with furtum conceptum relative to furtum manifestum, or discusses the Roman actio furti concepti that arose from this classification — researchers needing that level of detail should consult Justinian's Institutes and Digest directly.
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Jurisdictional Note
Furtum conceptum is a Roman civil law term with no direct equivalent in any modern common law jurisdiction. Its relevance in Anglo-American legal research is historical and comparative. Civilian jurisdictions with Roman law foundations may retain the conceptual framework, though modern criminal codes invariably use different terminology.
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