Definition
Error nominis is a Latin legal phrase meaning "error of name" — a mistake in the name or description of a person or thing in a legal instrument, pleading, or proceeding. The error is one of detail only: the name used is wrong or imprecise, but the person or thing intended is nonetheless identifiable from context. This distinguishes error nominis from error de persona, which involves a mistake as to identity itself — that is, a situation where the wrong person or thing was intended altogether.
The governing maxim attached to the concept is: Error nominis nunquam nocet, si de identitate rei constat — "A mistake in the name of a thing is never prejudicial, if it be clear as to the identity of the thing itself." This principle operates as a rule of non-prejudice: where the intended subject is sufficiently certain, a naming error will not invalidate the instrument or proceeding in which it appears.
Common Confusion
Error nominis is frequently paired with, and must be distinguished from, error de persona. The distinction is consequential:
- Error nominis: The right person or thing was intended; only the name is wrong. Remedied by showing that identity was clear despite the error.
- Error de persona: The wrong person or thing was intended from the outset. The error goes to the substance of the act, not merely its description.
A misspelled name in a will, for example, may constitute error nominis if surrounding language makes the intended beneficiary obvious. A bequest to the wrong individual entirely — one never contemplated by the testator — is error de persona. Courts and researchers must be careful not to treat the terms as interchangeable; the applicable doctrine and remedy differ substantially.
Why It Matters in Research
Error nominis appears across multiple areas of the historical corpus — wills and probate, conveyancing, criminal indictments, and civil pleadings — wherever the identity of a party or subject needed to be established despite a misdescription. For researchers working in pre-modern materials, this matters in several ways.
In indictment practice, historical courts were exacting about names in criminal charges. Error nominis provided a recognized defense in some contexts but was frequently rebuffed where identity was clear on the face of the record. Researchers reading older case reports should note that the invocation of error nominis in a criminal setting often signals a pleading technicality argument, not a substantive dispute about who committed the act.
In probate and wills research, the maxim functions as an interpretive safety valve: courts applying it allowed instruments to stand despite misdescription when extrinsic evidence clarified intent. Researchers tracing the treatment of naming errors across a testamentary corpus will find the doctrine applied unevenly, with equity courts being more permissive and common law courts more formalistic.
The companion maxim — Error, qui non resistitur, approbatur ("An error which is not resisted is approved") — also appears in the historical sources alongside error nominis. Researchers should be alert to this pairing, as it introduces a waiver or ratification dimension: a party who does not timely object to a naming error may be taken to have approved it. This connects directly to modern harmless error and plain error doctrine, though the conceptual lineage is imperfect.
Because error nominis is a term of art embedded in Latin maxim-based legal reasoning, it does not appear frequently in modern American appellate opinions by name. Researchers looking for its functional modern equivalent should search under "misnomer," "misdescription," or "variance between pleading and proof" in contemporary sources.
Historical Dictionary Support
Black's Law Dictionary and Rapalje & Lawrence are in full agreement on the core definition: error nominis is a mistake of detail in name, as opposed to error de persona, a mistake as to identity. Both reproduce the same governing maxim, and both treat the distinction as established. Neither source elaborates significantly on how courts resolved the question of when identity was "certainly known" — a gap researchers will feel when working with actual cases. The standard applied to determine whether identity was clear enough to overcome the naming error was a matter of judicial judgment applied to specific facts, and the dictionaries do not supply that test.
Rapalje & Lawrence separately notes the companion maxim Error, qui non resistitur, approbatur, sourcing it to Doct. & S. c. 70 (Doctor and Student by Christopher St. Germain). This connection is absent from Black's entry and is useful for researchers tracing the waiver dimension of naming error disputes in early common law and equity materials.
Neither dictionary addresses how error nominis intersects with modern procedural concepts such as harmless error or plain error review, which is expected given the historical character of the sources. Researchers must build that bridge themselves.
Encyclopedia Cross-Reference
Harmless Error and Structural Error (The Law Mind Criminal Law Encyclopedia)
Standards of Review on Appeal: De Novo, Abuse of Discretion, and Plain Error (The Law Mind Criminal Law Encyclopedia)