Definition
The mandator is the party who employs or engages another person to perform a mandate — that is, to carry out a specific task or act with respect to property or affairs, gratuitously and on the mandator's behalf. The mandator is the principal in the civil law contract of mandate, standing opposite the mandatory (or mandatary), who is the agent executing the commission.
In civil law systems, mandate is a distinct species of bailment or agency in which the agent acts without compensation. The mandator initiates the relationship by entrusting a task to another, and the relationship is characterized by the gratuitous nature of the agent's service. The mandator bears obligations as well — chiefly, to reimburse the mandatory for expenses incurred in performing the commission and to indemnify against losses arising from it.
Common Language
Modern common usage (Wiktionary): A director; one who gives a mandate or order. The person who employs another to perform a mandate.
Historical common usage (Webster's 1913): A director; one who gives a mandate or order. The person who employs another to perform a mandate.
The common and legal definitions are unusually close here, but the legal term carries a specific technical load that the ordinary usage obscures. In everyday speech, "mandator" simply means anyone who issues a directive. In law, mandator designates a party to a defined contractual relationship — the civil law mandate — with accompanying duties of reimbursement and indemnification. The casual sense suggests a one-directional authority; the legal sense implies mutual obligations.
Common Confusion
MANDATOR vs. MANDATORY (MANDATARY): These terms are easily confused because they derive from the same root. The mandator is the one who gives the commission; the mandatory (or mandatary) is the one who receives and executes it. Confusion is compounded because "mandatory" in modern English primarily functions as an adjective meaning compulsory — a usage entirely unrelated to the civil law agent role. Historical sources use "mandatory" and "mandatary" interchangeably for the agent; researchers should not read either as the modern adjectival sense.
MANDATOR vs. PRINCIPAL (AGENCY): In common law agency, the equivalent of the mandator is simply the principal. The distinction matters in research because mandate as a formal civil law category does not map cleanly onto common law agency. A mandator's relationship to the mandatory is gratuitous by definition; a principal-agent relationship under common law may involve compensation without altering its legal character.
Why It Matters in Research
This is primarily a civil law term and will appear most frequently in sources engaging Roman law, continental legal systems, Louisiana law, Quebec law, and Scottish law. Common law jurisdictions rarely deploy "mandator" as a term of art; researchers encountering it in English common law sources prior to the nineteenth century should note that Burrill records an older English usage simply meaning "commander" — a non-technical sense distinct from the civil law meaning.
The term is thinly documented in American case law outside Louisiana, where civilian tradition persists. Researchers working in Louisiana primary sources will find mandator used with full technical precision. Elsewhere in American materials, the concept is typically absorbed into general agency vocabulary without the label.
Pay attention to the gratuitous-service dimension. Sources that use "mandator" without addressing the question of compensation may be using the term loosely or may be working in a jurisdiction where mandate has been extended beyond its classical gratuitous scope. This is a live issue in comparative law scholarship.
The matching encyclopedia entries on insurance mandates (ACA individual mandate, mental health parity) are entirely unrelated to this term. "Mandate" in modern regulatory and constitutional contexts means something categorically different — a legal compulsion imposed by law — not the civil law contract of mandate. Do not use those encyclopedia entries as context for this term.
Historical Dictionary Support
All four source dictionaries converge on the core definition without meaningful divergence: the mandator is the party employing another to perform a mandate. Bouvier and Burrill both cite Story on Bailments § 138, which remains the canonical common law treatise discussion of mandate as a bailment category.
Burrill adds the most nuance of the four, distinguishing the civil law sense (one who gives a thing in charge to another regarding bailed property) from the old English sense (a commander, citing 2 Leonard 75). This dual-sense entry is useful for dating sources: the "commander" meaning is archaic even by Burrill's time, and researchers encountering it in early modern English legal texts should not assume the civil law contract is intended.
Burrill also notes the synonym mandans, which appears in some Latin-language civil law sources and in American courts invoking Roman law categories. The terms are interchangeable; neither is preferred in modern scholarship.
None of the historical dictionaries fully develop the mandator's affirmative obligations — reimbursement, indemnification — which are essential to understanding the term's legal significance. For that, Story on Bailments and civilian treatises must be consulted directly.
Jurisdictional Note
Louisiana is the primary American jurisdiction where mandator functions as a living term of art, rooted in the civilian tradition preserved in the Louisiana Civil Code. Researchers working in common law jurisdictions will find the term largely absent from modern primary sources; the concept is subsumed into general agency doctrine without the specialized vocabulary.