Definition
A writ is a formal written order issued by a court or other body with judicial or quasi-judicial authority, directing a named person or official to do or refrain from doing a specified act. The term functions both as a standalone noun and as the root of a large family of distinct legal instruments, each designated by the act commanded or the remedy sought.
In classical common law procedure, the writ was the foundational instrument of the entire system. Before a lawsuit could be heard in a royal court, the plaintiff was required to obtain the appropriate original writ — a standardized royal command authorizing the court to proceed and defining the cause of action. The form of the writ therefore determined the shape of the litigation. A plaintiff who selected the wrong writ, or whose grievance fit no existing writ, had no remedy in that court.
Over time, writs multiplied into an elaborate taxonomy. Some commanded action by a private party (writs of execution directing a sheriff to seize property). Some tested the legality of detention or authority (writs of habeas corpus, certiorari, mandamus). Some initiated appellate review (writs of error). Some were addressed to inferior tribunals, government officers, or public bodies.
In modern practice, the original writ system has been substantially abolished or replaced by notice pleading under civil procedure codes. The term survives most actively in the context of prerogative writs and extraordinary writs — constitutional and equitable instruments that retain independent force and have not been subsumed into the ordinary civil rules.
Common Language
Modern common usage (Wiktionary): A written order or command; in general usage, often understood loosely as any formal legal document or summons.
Historical common usage (Webster's 1913): "That which is written; writing; scripture; — used especially of the Scriptures, or the books of the Old and New Testaments; as, sacred writ." Also: "An instrument in writing, under seal, in an epistolary form, issued from a court, commanding the performance or nonperformance of some act."
The gap between common and legal meaning is significant. Ordinary usage treats "writ" as nearly synonymous with any formal written legal document. Legal usage is far more precise: a writ is a court-issued command with specific procedural function and defined legal consequences. Receiving a writ is not the same as receiving a pleading, notice, or summons, though all are written legal instruments.
Recognized Forms
/SUBTYPES
Original writ: The foundational common law instrument that initiated an action in a royal court by royal authority. Required before litigation could commence. Now largely abolished in jurisdictions that adopted code pleading.
Prerogative writ: A class of extraordinary writs historically available only at the instance of the Crown, or issued in the Crown's name, to control inferior courts and government officers. Includes certiorari, mandamus, prohibition, quo warranto, and habeas corpus.
Writ of execution: A post-judgment writ directing an officer (typically a sheriff) to enforce a court's judgment against a party's property or person.
Writ of error: The traditional common law mechanism for appellate review, commanding the lower court to produce the record for examination. Largely superseded by modern appeals in most jurisdictions, but still encountered in historical sources.
Extraordinary writ: The modern successor concept to prerogative writs, used in jurisdictions (including federal courts) to describe writs such as habeas corpus, mandamus, and prohibition when issued outside the ordinary course of appeal.
Why It Matters in Research
Researchers working in historical common law sources must understand that the writ was not merely a procedural formality — it was the substantive definition of the cause of action. The available writs determined what rights were cognizable. Searching historical case law without attention to the relevant writ form will produce incomplete results, because cases were indexed and organized by writ type. A trespass case and a case on the case were different writs, different procedures, and different remedies, even if the underlying facts were similar.
The transition from writ pleading to code pleading (beginning in the mid-nineteenth century in the United States with the Field Code, and in England with the Judicature Acts of the 1870s) marks a critical rupture in the sources. Materials before this transition speak the language of writs; materials after it do not. Researchers bridging pre- and post-reform sources must translate between these frameworks.
The survival of prerogative and extraordinary writs creates a separate research challenge. Habeas corpus, mandamus, certiorari, and prohibition remain active instruments in both federal and state courts, but their procedural homes vary significantly. In federal practice, certiorari is the primary vehicle for Supreme Court review; in some state courts, original writs of certiorari still operate independently of the appellate certiorari framework.
For corpus researchers in Law Mind, the term "writ" in historical sources almost always signals further specificity — the productive research question is always which writ, not merely whether a writ is present.
Historical Dictionary Support
Burrill's Law Dictionary treats "writ" as a term of art requiring elaboration through its specific forms, which reflects the classical understanding: the word alone was architecturally incomplete without its modifier. Burrill's broader dictionary substance — illustrated here in the surrounding entries on wreck of the sea, the Registrum Brevium, and related Latin forms — demonstrates the close connection between writ practice and the formulaic Latin of the Reg. Orig. (Register of Originals), the reference work that contained the approved forms of original writs. Researchers encountering "Reg. Orig." citations in Burrill and similar sources should understand this as a reference to the foundational compilation of writ forms, not a statutory or case authority.
Historical legal dictionaries are generally strong on the taxonomy of writs but tend to present the writ system as a going concern rather than as a historical artifact. Modern researchers should be alert to the fact that much of what historical dictionaries describe as current procedure had already become obsolete or was in the process of being abolished at the time of writing.
Jurisdictional Note
In the United States, writ practice varies significantly between federal and state courts. Federal courts retain the extraordinary writs under the All Writs Act. State courts vary widely: some have preserved specific original writ procedures for mandamus, prohibition, and habeas corpus as independent causes of action; others have absorbed them into general civil procedure. English law eliminated most original writs through the Supreme Court of Judicature Acts and subsequent reforms.
Encyclopedia Cross-Reference
See Law Mind Encyclopedia — Writs (taxonomy and historical function); Common Law Pleading (writ selection and cause of action); Extraordinary and Prerogative Writs (modern survival and constitutional dimensions); Habeas Corpus (the most active surviving writ in Anglo-American practice).