Definition
A procuracy is the written instrument or document by which a principal authorizes another person — a procurator — to act on their behalf. It is, in essence, the formal written evidence of agency: the document that creates and defines the procurator's authority. Where modern practice speaks of a power of attorney or letter of authority, historical legal usage employed procuracy to describe the same underlying instrument in its written form.
The term should be distinguished from the relationship or office itself. A procuracy is the instrument; the procurator is the person authorized by it; the procuration is the act of authorizing or the authority conferred. In tight historical usage, these three terms occupied distinct conceptual spaces, though writers and courts frequently used them interchangeably.
Common Language
Modern common usage (Wiktionary): The office of a procurator.
Historical common usage (Webster's 1913): The office or act of a proctor or procurator; management for another. Authority to act for another; a proxy. [Obs.]
The gap here is directional. Common usage — both modern and Webster's — centers on the office or the act, while the legal meaning in Black's centers on the instrument itself: the written document authorizing the procurator to act. A researcher who reads "procuracy" in a historical legal document as meaning simply "the role of an agent" will miss the specific evidentiary and formal significance the term carried in legal practice, where the written instrument was the operative legal fact.
Common Confusion
Procuracy, procuration, and proxy are frequently conflated in historical sources. Procuration can refer either to the act of appointing a procurator or to the fee paid to an agent for arranging a loan — a wholly separate legal concept in ecclesiastical and commercial law. Proxy similarly doubles as both the written instrument of authority and the person holding it. When reading historical records, determine from context whether the writer means the document, the authority it confers, the relationship, or the fee. Black's is consistent in defining procuracy as the instrument only, but source documents will not always be.
Why It Matters in Research
Procuracy is primarily a term of historical legal practice. Researchers will encounter it in ecclesiastical court records, civil law materials, notarial registers, and early commercial documents rather than in modern common law sources. By the nineteenth century the term was already marked as obsolescent in general usage (Webster's 1913 flags it as "[Obs.]"), and modern legal practice has replaced it functionally with power of attorney instruments.
Several research traps follow from this. First, the term's rarity in modern sources means keyword searches in contemporary legal databases will return little. Productive searching requires pivot terms: procurator, procuration, letter of attorney, and mandate (in its civil law sense). Second, in ecclesiastical records — probate, marriage, and disciplinary proceedings before church courts — procuracy was a live and precise term well into the early modern period, and the written procuracy was a jurisdictional prerequisite for an agent to appear and act. A missing or defective procuracy could void the agent's acts entirely. Third, in civil law jurisdictions and notarial practice, procuracy overlaps with the mandate (mandat), and researchers moving between common law and civil law sources should track which concept governs in the relevant jurisdiction and period.
The Law Mind corpus connections run through agency, power of attorney, and the ecclesiastical court materials. Any research thread involving historical representation, notarial instruments, or civil law agency will benefit from understanding procuracy as a formal documentary concept rather than a relational one.
Historical Dictionary Support
Black's first and second editions are in exact agreement: procuracy is "the writing or instrument which authorizes a procurator to act," citing Cowell's Interpreter and Termes de la Ley as authorities. This consistency across editions signals that the editors found no reason to develop or qualify the definition — likely because the term had already receded from active common law practice by the time Black's was compiled, and was preserved primarily for reference to older materials.
Both editions appropriately anchor the definition in the instrument rather than the office or the authority, which tracks the term's practical function in historical legal proceedings: the document was produced, examined, and ruled upon. What historical dictionary treatment misses is any distinction between the formal requirements of a valid procuracy and those of cognate instruments like a letter of attorney or a mandate. For civil law contexts, researchers should consult civilian sources directly, as Black's offers no comparative analysis.
Jurisdictional Note
Procuracy as a term of art has greater vitality in civil law jurisdictions and in Scottish law, where civilian influence persisted, than in English or American common law. In ecclesiastical law practice it retained technical precision longer than in secular courts. Researchers working in Louisiana, Quebec, or Scottish historical materials should treat the term as potentially active well past the point where it would have been archaic in English common law sources.