Definition
Intestacy is the condition or state of dying without having made a valid will. A person who dies in this condition is called an intestate. When intestacy occurs, the decedent's estate does not pass according to any testamentary instrument but is instead distributed by operation of law under the governing jurisdiction's statutes of descent and distribution.
Intestacy may be total or partial. Total intestacy occurs when the decedent left no will at all. Partial intestacy occurs when a will exists but fails to dispose of some portion of the estate — whether because the will is silent on certain assets, a residuary clause is absent or invalid, or a named beneficiary predeceased the testator without a saving provision.
Common Language
Modern common usage (Wiktionary): The state of being intestate, or of dying without having made a valid will.
Historical common usage (Webster's 1913): The state of being intestate, or of dying without having made a valid will. — Blackstone.
The common-language definitions are, in this instance, accurate legal definitions — likely because the word has no life outside the legal context. The practical gap is not in the definition but in what the word conceals: intestacy triggers an entire statutory regime governing who takes, in what shares, and in what order. The lay assumption that a surviving spouse or children automatically inherit everything, and in equal shares, is frequently wrong under the actual rules of descent.
Recognized Forms
/SUBTYPES
Total intestacy: The decedent left no will, or left only a document that entirely fails to qualify as a valid will under applicable law. The entire probate estate passes by statute.
Partial intestacy: A will exists and is admitted to probate, but it fails to reach some portion of the estate. The testated portion passes by will; the untestated portion passes by the intestacy statute. Courts apply construction rules to minimize partial intestacy, but the condition arises with some frequency when wills are drafted without residuary clauses or when residuary beneficiaries predecease the testator.
Why It Matters in Research
Intestacy is the default condition — it is what happens when private testamentary planning fails or is absent. Because every jurisdiction has enacted its own statutory scheme for intestate succession, the term in historical sources is a gateway concept that connects to the operative rules only through the local statutes in force at the time of death.
Several research traps are worth flagging. First, the statutes governing intestate succession have changed dramatically across time. The historical preference for primogeniture, the treatment of illegitimate children, the spousal share (historically modest or entirely dependent on dower rights), and the treatment of adopted children all varied by jurisdiction and shifted with legislative reform throughout the nineteenth and twentieth centuries. An estate administered in 1850 under the laws of one state will look nothing like one administered in 1980 under a jurisdiction that adopted the Uniform Probate Code.
Second, the Law Mind corpus contains significant primary material on descent and distribution statutes that must be read alongside any discussion of intestacy. The word itself describes a status; the consequences of that status are found in the statutes, not in definitions.
Third, researchers working with historical probate records should note that the line between testacy and intestacy was not always cleanly drawn. Nuncupative (oral) wills, holographic wills of questionable validity, and codicils that partially revoked earlier wills all created contested zones where the question of whether any valid testamentary instrument existed was itself in dispute.
Fourth, partial intestacy is frequently underappreciated. Many historical estates that went through probate on a will also had an intestate component — particularly estates accumulated after the will was executed and not reached by its terms.
Historical Dictionary Support
The four shelf sources are in precise agreement: intestacy is the state or condition of dying without having made a valid will. Black's Law Dictionary and Rapalje & Lawrence both include the qualifier "valid," emphasizing that the existence of a document purporting to be a will does not defeat intestacy if that document fails legal scrutiny. Bouvier's states the definition simply, without the "valid" qualifier, though Bouvier's treatment of intestacy more broadly makes clear the same principle applies. Burrill's entry is fragmentary in the available text — defining intestacy as "the state of an intestate; the condition of a party who dies without" — but consistently with the others points toward the governing concept.
What the shelf sources do not supply is any treatment of partial intestacy as a formally recognized category, nor do they address the consequences of intestacy with any depth at the definitional level. These sources treat intestacy as a status concept and direct the reader elsewhere for the operative rules. This is accurate and appropriate, but researchers should not mistake the brevity of the definition for the simplicity of the subject.
The alignment of Webster's 1913 with the legal dictionaries — including its attribution to Blackstone — reflects how thoroughly this term belongs to law rather than to general usage.
Jurisdictional Note
Intestate succession rules are entirely creatures of state statute in American law, and they vary considerably across jurisdictions in their treatment of spousal shares, issue, collateral relatives, and non-marital children. A number of states adopted the Uniform Probate Code or its revisions, creating some convergence, but significant variation remains. Historical research must be anchored to the statute in force in the governing jurisdiction at the date of death.
Encyclopedia Cross-Reference
Intestacy — General Principles, Statutory Framework, and the Role of Descent and Distribution Statutes (The Law Mind Trusts, Estates & Probate Encyclopedia)