Definition
Delectus (also rendered delectus personae or delectus personarum) is a Latin legal term meaning "choice of person" or "choice of persons." In law, it refers to the principle that a party to a particular legal relationship — most commonly a partnership — holds an absolute and personal right to decide who may join or become a participant in that relationship. No person can be forced upon an existing partner as a co-partner; the choice of associates is entirely the prerogative of those already in the arrangement.
The principle operates most distinctly in partnership law, where it stands as a foundational reason why a partner's interest in a firm is not freely assignable as a full membership interest. An outgoing partner, or the heirs of a deceased partner, may be entitled to a share of the firm's value — but the remaining partners cannot be compelled to admit a new partner or to continue in business with an unwanted associate.
Common Language
Modern common usage (Wiktionary): An elementary reader, typically a collection of passages compiled for learners of Latin or Greek.
Historical common usage (Webster's 1913): A name given to an elementary book for learners of Latin or Greek.
The common usage of "delectus" has nothing to do with its legal meaning. Researchers encountering the word in a pedagogical or academic context should not assume any legal significance. The legal term is almost always paired with its companion phrase — delectus personae or delectus personarum — which signals unambiguously that the partnership or agency sense is intended. A bare "delectus" in a legal text, however, carries the same legal weight as the full phrase.
Common Confusion
Delectus personae is sometimes loosely described as a rule against assignment of partnership interests. This is imprecise. The principle does not prevent an existing partner from assigning the economic value of their interest (their right to profits and surplus); it prevents that assignee from becoming a full partner — with management rights, access to accounts, and a voice in firm decisions — without the consent of all existing partners. The confusion matters in research because older texts sometimes speak interchangeably of "assignment" and "admission," which are distinct acts with distinct consequences.
Why It Matters in Research
Delectus personae is a concept that runs through centuries of partnership doctrine and resurfaces wherever researchers encounter disputes over partnership succession, involuntary dissolution, or the rights of heirs and assignees. Several navigational notes:
First, the principle is frequently invoked to explain why partnerships dissolve on the death or insolvency of a partner rather than continuing automatically — the surviving partners did not choose the deceased's estate or the assignee as their associate. This means the term appears in dissolution cases even when the word itself is absent.
Second, researchers working in equity jurisdiction sources will find delectus personae discussed in the context of specific performance: courts historically declined to compel a reluctant party to accept a particular partner, reasoning that partnership is a relationship of personal confidence. This connects the term to the broader equitable maxim that courts will not enforce contracts for personal service or personal association.
Third, the principle applies beyond formal partnerships. It surfaces in joint venture law, in professional association disputes (particularly among attorneys, physicians, and accountants organized as partnerships), and in close corporation doctrine, where courts sometimes borrow partnership reasoning by analogy.
Fourth, in historical sources the full Latin phrases — delectus personae and delectus personarum — appear inconsistently. Some writers use the singular (personae, genitive singular: "of a person") to emphasize the individual choice; others use the plural (personarum) to emphasize the collective membership decision. Both forms point to the same doctrine. Do not treat the variation as signaling a doctrinal distinction unless the source explicitly draws one.
Historical Dictionary Support
Anderson's Dictionary of Law gives the clearest and most concise formulation: delectus personae is "the absolute right which belongs to each member of a firm to decide what new partners, if any at all, shall be admitted to the firm." The emphasis on absoluteness is notable — Anderson does not treat this as a default rule subject to contrary agreement, but as an inherent feature of the partnership relation. That framing reflects the classical common law understanding.
What historical dictionaries characteristically omit is the modern statutory overlay. Partnership acts in multiple jurisdictions (including the Uniform Partnership Act and its successors in the United States) codified aspects of this principle, and the tension between the classical absolute-right formulation and the statutory framework is not addressed in dictionary sources of Anderson's era. Researchers should treat historical dictionary entries on delectus as reliable for the core doctrine but incomplete as a guide to contemporary statutory treatment.
No significant divergence exists among the major historical dictionaries on the substance of this term; the doctrine was settled enough that variations in phrasing are editorial rather than substantive.
Jurisdictional Note
The delectus personae principle is recognized across common law jurisdictions, but its statutory expression varies. In the United States, the Revised Uniform Partnership Act (RUPA) addresses transferability of partnership interests and admission of new partners in ways that largely codify the principle while adding procedural detail. In Scotland, where Scots law draws heavily on Roman law foundations, delectus personae has an especially prominent role and is applied across a broader range of contractual relationships beyond partnership.
Encyclopedia Cross-Reference
See Law Mind Encyclopedia — Partnership (for dissolution, assignment of interests, and admission of new partners); Agency by Agreement (for the personal-confidence rationale as applied to agency relationships).