Definition
A chargé des affaires is a diplomatic official who serves as the temporary head of a diplomatic mission in the absence of the ambassador or minister. The title designates either a diplomat appointed to lead a mission on an interim basis when the principal envoy is away (chargé des affaires ad interim) or, less commonly, a diplomat appointed by the sending state to head a mission permanently when no ambassador or minister has been accredited (chargé des affaires en titre or en pied).
In either case, the chargé des affaires holds the lowest rank among the three classes of heads of diplomatic missions recognized under international diplomatic protocol. The position carries the authority to conduct the full business of the mission, bind the sending state in diplomatic communications, and receive the privileges and immunities that attach to the mission's head—though with a protocol standing beneath that of ambassadors and ministers.
---
Common Language
Modern common usage (Wiktionary): A diplomat who temporarily acts as the head of a diplomatic mission in the absence of the ambassador.
Historical common usage (Webster's 1913): "An officer charged with the business of a diplomatic mission during the absence or incapacity of the ambassador, minister, or other chief of the mission; also, one entrusted with the management of diplomatic affairs of inferior importance."
The gap between ordinary and legal usage here is narrow, but the legal dimension matters: the term carries formal rank implications under treaty law and protocol that casual usage obscures. Common usage treats the chargé des affaires simply as a stand-in; international law attaches precise procedural rules governing notification to the host state's foreign ministry, the form of the appointment, and the scope of authority—distinctions that become legally operative in questions of diplomatic immunity, state responsibility, and treaty capacity.
---
Common Confusion
Do not conflate the two recognized forms of chargé des affaires. The chargé des affaires ad interim is appointed informally by the absent ambassador or minister to manage the mission temporarily; the chargé des affaires en titre (or en pied) is formally accredited by the sending state's government as the mission head when no ambassador or minister is posted. The distinction affects both the formality of appointment and the host state's obligations in receiving them.
The term is also sometimes loosely used to describe any lower-ranking diplomat left in charge of routine matters, which is imprecise. The chargé des affaires is specifically the head of mission—however temporarily—not merely a senior officer handling administrative duties.
---
Recognized Forms
/SUBTYPES
Chargé des affaires ad interim: Appointed by the head of mission to act during a temporary absence. Notification is typically made to the host state's ministry of foreign affairs. This is by far the most common usage in practice.
Chargé des affaires en titre (en pied): Formally appointed by the sending state as the permanent head of mission at a lower diplomatic level. Used when relations between two states do not rise to the level warranting an ambassador or minister.
---
Why It Matters in Research
Researchers working in the Law Mind corpus will encounter this term primarily in three contexts: diplomatic history, international law treatises, and materials concerning diplomatic immunity and state responsibility.
The significant trap in historical sources is terminological inconsistency. Nineteenth and early twentieth-century sources often use "chargé" loosely to mean any acting diplomat, and the distinction between the ad interim and en titre forms is frequently blurred or ignored entirely. When reading historical state papers, dispatch collections, or early international law commentary, verify which form the author intends before drawing conclusions about the diplomat's authority or the formality of any agreements concluded.
Black's 2nd Edition entry reproduced in these source materials reflects a different legal concept entirely—"charge" in the sense of a testamentary or equitable burden on property. This is a critical source artifact: the historical legal dictionaries indexed in this corpus may conflate or adjacently catalog "charge" (the English legal term) with "chargé des affaires" (the diplomatic title). Researchers should be alert to this indexing overlap and confirm which term a given source passage is actually addressing.
Jurisdictional variation matters less here than it does for domestic legal terms, but researchers should note that U.S. State Department practice and the Vienna Convention on Diplomatic Relations (1961) govern modern usage. Pre-Vienna Convention sources—anything before the mid-twentieth century—operate under customary international law and earlier treaty frameworks, and may use the term with different procedural assumptions.
---
Historical Dictionary Support
Black's Law Dictionary (2nd Ed.) does not appear to contain a substantive entry for "chargé des affaires" as a diplomatic term. The source material provided under this heading describes a different legal concept—the equitable "charge" imposed by a testator on a devisee, and the use of a "charge" paper in chancery proceedings before a master. This strongly suggests that the historical dictionary indexed here is addressing "charge" as a term of domestic equity and probate law, not the diplomatic title.
Researchers should not rely on Black's 2nd Edition for substantive treatment of the diplomatic title. The better historical sources for this term are international law treatises of the nineteenth century—Vattel, Wheaton, and later Oppenheim—which address the classes and precedence of diplomatic agents with greater precision than domestic legal dictionaries of the same era.
---
Jurisdictional Note
Modern usage is governed internationally by the Vienna Convention on Diplomatic Relations (1961), which classifies diplomatic agents and establishes the rules for chargés des affaires in Articles 14–19. United States domestic practice follows the Convention and State Department implementing regulations. Pre-Convention practice in the U.S. and European states was governed by customary rules codified in part by the Congress of Vienna (1815) and the Aix-la-Chapelle Protocol (1818).
---