Definition
In civil law, a formal accusation or information laid against a person before a competent authority. The term describes the act of denouncing or reporting another's alleged wrongdoing to an official body empowered to investigate or prosecute. Delatio was a recognized procedural mechanism in Roman law by which a private individual brought a matter to the attention of the state, initiating formal inquiry or prosecution.
Why It Matters in Research
Delatio is a term of Roman and civil law provenance and will appear almost exclusively in sources dealing with that tradition — treatises on Roman law, civil law commentaries, and ecclesiastical or canon law materials. Researchers working in common law sources will rarely encounter it; its appearance in English-language legal dictionaries reflects the 19th-century practice of cataloguing civil law vocabulary for comparative and scholarly use rather than practical domestic application.
The term is most relevant to researchers tracing the history of accusatorial versus inquisitorial procedure. In Roman law, the delator — the person making the delatio — occupied a legally significant and, over time, socially fraught role. Under the late Republic and early Empire, professional delatores who informed against others for personal gain became notorious, and the practice was associated with political persecution. This historical dimension is entirely absent from the brief dictionary definitions but is essential context for anyone reading primary or secondary civil law sources where the term appears with charged connotations.
Researchers in canon law and ecclesiastical procedure may also encounter delatio in the context of reporting offenses to church authorities. The term carried over from Roman law into canonical procedural vocabulary, where it retained its meaning as a formal denunciation initiating ecclesiastical proceedings.
Historical Dictionary Support
All four source dictionaries agree exactly: delatio means an accusation or information in the civil law. Black's (both editions) and Bouvier's offer bare, nearly identical one-line definitions. Burrill's adds the most useful information of the four, noting the Latin derivation from deferre (to accuse or denounce) and citing Calvinus's Lexicon Juridicum — a 17th-century civil law reference work — as authority, as does Bouvier's.
The historical sources do no more than identify the term and assign it a category. None addresses the social or institutional history of the delator, the distinction between voluntary and compelled delatio, or the term's passage into canon law. For any substantive research purpose beyond establishing that the term means "accusation" in the civil law tradition, these entries are starting points only. Researchers should look beyond the dictionary shelf to civil law treatises and Romanist scholarship for fuller treatment.
Jurisdictional Note
Delatio has no operative meaning in Anglo-American common law jurisdictions. It is a historical civil law term and functions in legal research as a term of art for Roman law and its derivative systems, including canon law and certain continental European legal traditions.