Definition
In jure alterius is a Latin maxim meaning "in another's right." It describes the legal condition of a person who holds, asserts, or exercises a right not as their own but derivatively — on behalf of, or by virtue of, the right belonging to another person. The person acting in jure alterius has no independent title or claim; their legal standing is entirely dependent on the right of the principal or original holder.
The concept arises most naturally in contexts involving agency, representation, fiduciary relationships, and derivative legal interests. An executor asserting rights on behalf of an estate, a trustee holding property for beneficiaries, or an agent bringing an action in the name of a principal each act in some measure in jure alterius — in a right that is not theirs in substance.
Why It Matters in Research
Researchers encountering in jure alterius in older texts should treat it as a signal concept rather than a standalone doctrine. The phrase appears most often as explanatory shorthand embedded in discussions of Roman-derived procedural distinctions and representative legal relationships, not as a cause of action or an independent rule.
The phrase appears alongside the structural distinction between proceedings in jure (before the praetor, involving questions of law and formal pleading) and proceedings in judicio (before the judex, involving factual trial). When historical sources cite in jure alterius in this procedural context, they are addressing who has standing to appear and assert rights at the in jure stage — specifically, whether a party appears in their own right or derivatively. Researchers conflating the procedural phrase in jure with the relational phrase in jure alterius will misread the passage.
In English common law sources, the maxim surfaces in equity and fiduciary analysis. Hale's Analysis — the consistent citation across all source dictionaries — uses it to articulate the foundational principle that some legal actors possess no original right but derive their entire legal capacity from another's entitlement. This has practical implications for privity, standing, and the scope of remedies available to representative parties.
In research touching on insurance subrogation, agency law, trusts, or the historical law of executors and administrators, in jure alterius may appear as a conceptual anchor explaining why a party can sue (or be sued) despite holding no personal interest in the subject matter. Understanding this grounding prevents misreading the derivative party as a stranger to the litigation.
Historical Dictionary Support
The source dictionaries are in unanimous agreement on the core translation: "in another's right." Black's (1st and 2nd editions), Burrill, and Bouvier all cite Hale's Analysis, section 26, as the authoritative reference — an unusual degree of convergence that suggests the maxim's meaning was stable and uncontested across the relevant period.
No source dictionary offers extended analysis of the maxim's practical applications. The entries function as glosses: brief, translational, and designed to assist a reader who has encountered the phrase in a primary source rather than to develop the concept doctrinally. This is a meaningful gap. The phrase carries more weight in context than any of these dictionaries signal.
Black's (1st edition) embeds the phrase within a longer passage that also references the maxim in jure, non remota causa sed proxima spectatur ("in law, the proximate and not the remote cause is regarded"). The juxtaposition is incidental — the entries are adjacent, not analytically linked — but researchers should not read causation doctrine into the in jure alterius entry based on this proximity.
Burrill adds only the Latin attribution tag ("Lat.") and the Hale cite, offering nothing beyond the translation. Bouvier matches this minimalism. Neither source traces English common law applications, which is where the phrase does the most practical work in Anglo-American legal materials.
Jurisdictional Note
As a Latin maxim of general jurisprudence rather than a rule of positive law, in jure alterius carries no jurisdiction-specific content. Its relevance is determined entirely by context: the doctrine or relationship it is used to describe — agency, trusteeship, subrogation, executorship — will carry its own jurisdictional variation.