Definition
A petition de droit — French for "petition of right" — was a procedural mechanism in English law by which a private subject could seek restitution of real or personal property held by the Crown. Where the Crown was in possession of hereditaments (land and related rights) or chattels, and the petitioner claimed a right that contradicted the Crown's title, the petition of right allowed that claim to be formally presented and adjudicated. The petitioner's right had to be grounded on facts stated within the petition itself, not merely asserted in the abstract.
The petition de droit was one of two principal modes of proceeding against the Crown in English practice. It was distinguished from the petition of grace (or petition à droit), which sought a favor or discretionary remedy from the Crown rather than the enforcement of a legal right. Where the petitioner had a clear legal right capable of demonstration on the face of the petition, the petition de droit was the appropriate form.
Common Confusion
The petition de droit is frequently conflated with two related but distinct concepts. First, it is confused with the petition of grace, which sought an equitable or discretionary remedy from the sovereign rather than asserting a legal right. Second, modern usage sometimes collapses "petition de droit" and "petition of right" into a single undifferentiated term, obscuring the historical precision with which English practice distinguished among the forms of proceeding available against the Crown. In contemporary and Commonwealth usage, "petition of right" has largely absorbed and replaced the older French terminology, but researchers working with pre-twentieth-century English sources should treat the French form as the technically precise designation.
Why It Matters in Research
This term is almost exclusively a feature of English legal history. Researchers will encounter it primarily in sources dealing with Crown proceedings, sovereign immunity, and the historical development of actions against the state. Several navigational considerations apply.
First, the term signals a historical stratum. Petition de droit appears in English sources from the medieval period through the nineteenth century. The Petitions of Right Act 1860 modernized the procedure, and the Crown Proceedings Act 1947 effectively abolished the petition of right as a distinct form in English law by allowing ordinary civil suits against the Crown. A researcher encountering the term in a source must therefore situate it within this timeline: pre-1860, post-1860, or post-1947 sources will treat the procedure very differently.
Second, the Law French form of the term ("petition de droit" rather than "petition of right") signals older sources or sources written with technical precision. Burrill's and Black's both render the definition identically and cite Blackstone's Commentaries, Book III at page 256, which remains the most accessible foundational explanation. Researchers should go directly to Blackstone for doctrinal context.
Third, the term has essentially no parallel in American law. The United States inherited the common law but rejected sovereign immunity in its English monarchical form, developing instead a distinct body of federal and state sovereign immunity doctrine. American researchers who encounter "petition de droit" are almost certainly reading an English source or an American commentary on English legal history, not a document relevant to American practice.
Fourth, the term connects to the broader concept of sovereign immunity and its gradual erosion. Understanding petition de droit is essential background for tracing how modern administrative law and statutory waiver of immunity developed — the petition of right was, for centuries, the only formal mechanism by which a subject could compel the Crown to answer a property claim.
Historical Dictionary Support
Black's Law Dictionary and Burrill's Law Dictionary provide identical definitions, both citing Blackstone's Commentaries, Book III, page 256. This agreement reflects the standard treatment of the term across the nineteenth-century common law dictionary tradition: both sources understood petition de droit as a technical procedural form, precisely distinguished by the requirement that the petitioner's right appear on the face of the petition itself. Neither dictionary addresses the procedural reforms of 1860 or the eventual abolition of the form in 1947, which is a significant gap for researchers working in that period. Burrill notes the existence of "a late case of this kind" without further specification, suggesting the procedure was still occasionally invoked at the time of his writing. Neither source addresses the American non-adoption of this procedure, nor do they discuss the petition's relationship to the developing doctrine of sovereign immunity in any analytical depth. Researchers seeking substantive doctrinal treatment should consult Blackstone directly and, for the reform period, Holdsworth's History of English Law.
Jurisdictional Note
Petition de droit is a creature of English law with no operative equivalent in American practice. Commonwealth jurisdictions that inherited English procedure may retain historical references to the form, but the Crown Proceedings Act 1947 (England and Wales) and equivalent legislation in other Commonwealth countries have rendered the petition de droit obsolete as a living procedure. It survives as a historical and analytical concept only.