Definition
A deputy is a person duly authorized by a public officer to perform some or all of the functions of that office in the officer's place and stead. The deputy acts not in their own right but by delegation — stepping into the principal officer's role while remaining subordinate to it.
Three related but distinct senses appear in legal usage:
1. General deputy. A deputy empowered to perform all ordinary duties of the office. A sheriff's general deputy, for example, may serve process, make arrests, and otherwise exercise the full range of the sheriff's ministerial authority.
2. Special deputy. A deputy appointed for a specific act or limited purpose — to manage a particular emergency, execute a single writ, or perform a defined task — whose authority does not extend beyond that commission.
3. Legislative deputy. In some civil-law-influenced jurisdictions and foreign legal systems, "deputy" denotes a member of a national legislature. This usage appears in references to the French National Assembly and similar bodies and is distinct from the administrative-delegation sense dominant in Anglo-American law.
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Common Language
Modern common usage (Wiktionary): One appointed as the substitute of another, empowered to act in their name or behalf; also a member of a legislature in some countries; in British mining usage, a safety official responsible for gas clearance and propping.
Historical common usage (Webster's 1913): One appointed as the substitute of another and empowered to act for them in their name or behalf; a substitute, lieutenant, representative, delegate, or vicegerent.
The common and legal meanings are closely aligned, but legal usage draws a technically important line: a deputy acts in the principal's name and for the principal's account, while the principal remains answerable for the deputy's conduct. Ordinary usage treats "deputy" and "substitute" as interchangeable without capturing this accountability structure, which is the legally operative feature.
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Common Confusion
Deputy vs. Assignee. The historical sources consistently flag this distinction, and it remains analytically significant. An assignee acquires an interest in the office itself, acts in their own name, and the grantor-officer is generally not responsible for the assignee's conduct. A deputy has no interest in the office, acts always in the principal's name, and the principal officer bears responsibility for the deputy's official misconduct. Burrill traces this distinction to Termes de la Ley and notes that "deputy" was occasionally used in early sources to mean "assignee" — a usage that is now obsolete but appears in older materials and can mislead researchers.
Deputy vs. Agent. A deputy is a species of agent, but the term carries specific public-office connotations. Not every agent of a public officer is a deputy; the deputy relationship requires formal authorization and typically arises by statute or the officer's delegating power. The word "agent" in legal documents involving public officers does not necessarily confer deputy status.
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Recognized Forms
/SUBTYPES
General Deputy. Authorized to perform all ordinary functions of the principal office. Acts with the full scope of the officer's ministerial authority.
Special Deputy. Authorized for a particular act or occasion only. Authority is exhausted upon completion of the assigned task.
De Facto Deputy. A person who acts as a deputy under color of authority without full technical compliance with appointment formalities. Courts have recognized de facto deputy status to protect third parties who relied on the apparent authority of the actor.
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Why It Matters in Research
The deputy relationship is a recurring feature of public law, sheriff's law, tax collection, and administrative history — but the word carries different legal weight depending on the era and jurisdiction. Researchers face three practical traps.
First, early sources use "deputy" and "assignee" interchangeably. Burrill explicitly notes that "deputy was anciently used in the sense of assignee" and that administrators were sometimes called the ordinary's deputy. In pre-19th-century materials, encountering "deputy" does not automatically signal the modern sense of a non-interest-holding delegate; context and date matter.
Second, the question of whether a principal officer is liable for a deputy's misconduct is not settled uniformly across time or jurisdiction. The general rule — the principal answers for the deputy — appears consistently in Bouvier and Black, but statutory modifications in many states altered or reversed this rule for particular offices (sheriffs most often). When researching liability questions, the deputy-principal relationship is a jurisdictional variable, not a fixed rule.
Third, legislative usage creates index and search noise. References to "deputies" in materials touching French, Spanish, or Latin American legal systems almost certainly mean elected legislators, not administrative delegates. Failing to disambiguate produces false corpus connections.
The Anderson entry is particularly useful for the general/special deputy taxonomy, which structures most statutory treatments of the relationship. The Bouvier entry contains the most complete treatment of the judicial/ministerial distinction — important when evaluating whether a given office could lawfully create a deputy at all.
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Historical Dictionary Support
The major dictionaries agree on the core definition and the critical deputy/assignee distinction. Black's (both editions), Bouvier, Burrill, and Anderson all define a deputy as one who exercises an office in another's right, without interest in the office, acting in the principal's name, with the principal answerable for misconduct.
Bouvier adds the most nuance on which offices could support a deputy: ministerial officers could generally appoint deputies, but offices requiring personal exercise of discretion — or those with a judicial character — were subject to limits. This qualification is absent from Black's definition and matters for research into whether a particular delegation was legally effective.
Burrill is the most historically rich entry, flagging the obsolete assignee usage and tracing the term through Tomlins and Termes de la Ley. Researchers working in early modern legal materials should treat Burrill's note as a flag for terminological instability.
The Rapalje & Lawrence entry in the source material appears to have been misassigned — its content addresses deposition admissibility, not the term "deputy." It provides no useful information for this entry and is disregarded.
What the historical dictionaries collectively underemphasize is the de facto deputy doctrine and the statutory displacement of common-law liability rules — both of which became significant in 19th- and 20th-century case law.
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Jurisdictional Note
In most American states, the sheriff-deputy relationship is the paradigm case and is governed by statute. Some states make the sheriff personally liable for a deputy's official misconduct; others limit or eliminate that liability by statute. The power of a deputy to bind the principal, and the conditions for lawful appointment, vary enough that state-specific statutory research is necessary before drawing conclusions from the general common-law rule.
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Encyclopedia Cross-Reference
See Law Mind Encyclopedia: Public Officers; Delegation of Authority; Sheriff.
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