Definition
De deceptione (Latin: "of deceit") is an obsolete common law writ that lay against a person who acted in another's name — without authorization or fraudulently — causing that other person damage and deception as a result. The writ was the procedural mechanism by which an injured party could seek redress when someone had usurped their legal identity to transact, appear, or act in legal proceedings, thereby binding or harming the true party without their knowledge or consent.
The writ belongs to the family of original writs that originated in English chancery practice. It is sometimes rendered in English sources simply as the "writ of deceit" or "writ of disceit."
Common Confusion
De deceptione is distinct from the general common law action of deceit (the ancestor of modern fraud). The writ of deceit addressed a specific wrong: impersonation or unauthorized use of another's name in legal or formal proceedings. It was not a general remedy for fraudulent misrepresentation between strangers. Researchers encountering "writ of deceit" in historical sources must determine from context whether the reference is to de deceptione specifically or to the broader deceit action, which developed along a separate track.
Why It Matters in Research
This term appears almost exclusively in pre-modern English legal sources and will be encountered by researchers working in the history of English common law writs, early fraud and impersonation doctrine, or the Register of Original Writs (Registrum Omnium Brevium). It has no surviving procedural form in any modern common law jurisdiction.
Several research traps apply:
First, the phrase "writ of deceit" in historical sources is ambiguous. Both de deceptione and the general action of deceit were sometimes called by that name. Bouvier's inclusion of the alternate spelling "disceit" signals that variant spellings appear in manuscript and early print sources and should be anticipated when searching historical indexes.
Second, researchers tracing the doctrinal lineage of fraud, misrepresentation, or identity theft in Anglo-American law may look to de deceptione as an early ancestor. The writ is conceptually upstream from modern causes of action addressing unauthorized agency, identity fraud, and abuse of legal process — but the genealogical link is indirect. The writ was a specific procedural remedy, not a statement of substantive doctrine, and later common law absorbed its function into other forms.
Third, the sole authority cited across all four source dictionaries is Registrum Omnium Brevium (Reg. Orig. 112), the historical Register of Original Writs. Researchers seeking primary source verification should consult that register directly; secondary dictionary entries for this term derive from the same single source and offer no independent elaboration.
Historical Dictionary Support
The four historical dictionaries consulted — Black's (1st and 2nd editions), Bouvier's, and Rapalje & Lawrence — are in near-complete agreement, reproducing substantially identical definitions. This uniformity is itself informative: it indicates the term had a settled, narrow meaning that did not evolve or generate interpretive dispute within the common law tradition. The writ's scope was fixed and its use obsolete by the time English legal dictionaries were being systematically compiled.
Bouvier adds one modest variation, noting the alternate English rendering "disceit" alongside "deceit" — a detail the other sources omit. This is the only material divergence across the four entries.
None of the historical sources provide doctrinal elaboration, case examples, or discussion of how the writ was applied in practice. Researchers should treat dictionary definitions of this term as a starting point only; the Register of Original Writs and secondary histories of the English writ system are necessary for anything beyond basic identification.
Jurisdictional Note
De deceptione is a historical English common law writ with no equivalent surviving form in any modern jurisdiction. American jurisdictions never adopted it as a distinct procedural mechanism. Researchers will encounter it only in English legal history and comparative historical contexts.