Definition
In Roman civil law, the formal act by which an heir accepted an inheritance. Aditio hereditatis — the "entering upon" an estate — was the mechanism through which a voluntary heir (heres voluntarius) signaled acceptance of a decedent's estate, thereby acquiring both its assets and its liabilities. Without aditio, the inheritance remained in a suspended state (hereditas iacens) and the heir acquired nothing.
The act could be performed expressly, by formal declaration, or through conduct that implied acceptance — known as pro herede gestio. A heir who neither accepted nor repudiated within the allotted time could, under classical Roman law, be pressed by creditors seeking a praetorian remedy to compel a decision.
Why It Matters in Research
Aditio is a term of Roman law that does not map cleanly onto any single concept in Anglo-American common law. Researchers working in Roman law sources, civil law jurisdictions, or comparative succession materials will encounter it regularly; those working exclusively in common law sources almost never will. The key traps:
Historical sources indexed under aditio may require cross-referencing with adire, hereditas iacens, repudiatio, and cretio — the time-limited formal acceptance procedure that preceded the more relaxed pro herede gestio. These terms are often treated as a cluster in the Digest and in civilian commentaries, but may be indexed separately in secondary dictionaries.
The concept has modern relevance in civil law jurisdictions (Louisiana, Quebec, Scotland, and continental European systems) where beneficiary acceptance of succession remains a formal legal event with distinct procedural requirements. Researchers comparing Anglo-American and civil law systems should not assume that the common law's automatic vesting in the personal representative — which has no analog in the Roman aditio framework — makes the concepts equivalent.
In Louisiana specifically, the acceptance or renunciation of a succession retains civilian character and is treated distinctly from common law probate administration. Burrill's cross-reference to Dig. 29.2 is genuine and useful: that title of the Digest (De adquirenda vel omittenda hereditate) is the primary Justinianic source.
Historical Dictionary Support
Burrill's Law Dictionary provides a compact but accurate entry, correctly identifying aditio as a civil law term meaning the entering upon an inheritance and directing the reader to the Digest at 29.2. The cross-reference to adire is appropriate, as Burrill treats the verb and the noun form separately.
Burrill's entry is skeletal by design. It does not distinguish between the different modes of acceptance (formal oral declaration, cretio, or pro herede gestio), nor does it address hereditas iacens, the doctrine of the suspended inheritance that gives aditio its legal consequence. A researcher relying on Burrill alone would understand that aditio means acceptance but would miss the procedural stakes — namely, that the estate's liabilities followed the heir upon acceptance with no ability to disclaim post-aditio under classical law.
No significant divergence exists across the historical dictionary sources because coverage is thin: aditio appears in Roman law dictionaries and civilian-influenced compilations but is largely absent from purely common law references such as Bouvier or Black's early editions. Its absence from those sources is itself informative.
Jurisdictional Note
Aditio is a Roman law term and has no direct operation in common law jurisdictions. In civil law systems that derive from Roman law — including Louisiana and most continental European legal systems — the concept of formal acceptance of succession retains functional analogs to aditio, though the modern procedural rules differ by jurisdiction.
Encyclopedia Cross-Reference
Law Mind Encyclopedia — Inheritance (Roman Law)
Law Mind Encyclopedia — Hereditas Iacens
Law Mind Encyclopedia — Succession (Civil Law)