Definition
Donor is the party who gives, grants, or confers something upon another. The term carries distinct meanings across different legal contexts, each with its own doctrinal framework.
1. Property law (historical): In old English law, the donor was the party who conveyed lands to another by way of donatio — a gift of real property. In the law of estates tail, the donor was specifically the person who granted land to a donee in fee tail, with the terms of that grant defining the conditions and limitations of the estate. The donor's intent controlled the scope of the donee's interest and the line of inheritance.
2. Powers of appointment: In modern property law and trust law, the donor is the party who creates and confers a power of appointment upon another (the donee of the power). The donor defines the scope, conditions, and permissible objects of the power. This usage is distinct from the gift context — the donor of a power is not giving property directly but delegating authority to dispose of it.
3. Gift law (general): Broadly, any person who makes a gratuitous transfer of property — real or personal — to another without legal obligation or consideration. This is the sense most common in modern non-property contexts, including charitable giving, inter vivos gifts, and testamentary gifts.
4. Modern specialized contexts: The term has expanded significantly in contemporary law to cover gamete donors (sperm, egg, and embryo contributors in assisted reproduction), organ and tissue donors (living or deceased persons authorizing anatomical gifts), and blood donors. Each context carries its own statutory framework, consent requirements, and legal consequences distinct from classical property-law donorship.
Common Language
Modern common usage (Wiktionary): One who makes a donation.
Historical common usage (Webster's 1913): One who gives or bestows; one who confers anything gratuitously; a benefactor. One who grants an estate; in later use, one who confers a power.
The common-language definition of donor — a person who gives something freely — maps reasonably onto the general legal sense. The gap emerges in two directions: the technical property-law meaning (donor as grantor of an estate tail or creator of a power of appointment) carries precise doctrinal consequences that ordinary usage does not suggest, and modern specialized legal uses (gamete donor, organ donor) have developed their own statutory frameworks in which "donation" is a legal status with significant rights and liability implications, not merely a description of generosity.
Recognized Forms
/SUBTYPES
Donor of a power of appointment: The person who creates a power, defining its scope and objects. Distinct from the donee, who exercises it.
Donor of an estate tail: Historical; the grantor whose deed of gift established the fee tail and controlled inheritance.
Inter vivos donor: One who makes a gift during their lifetime, subject to the elements of valid gift (intent, delivery, acceptance).
Testamentary donor: One who makes a gift by will; more commonly called a testator or bequeather in that context.
Gamete/embryo donor: A person who contributes genetic material for use in assisted reproduction, typically under a written agreement and applicable state statute; legal parentage consequences vary by jurisdiction and statutory scheme.
Organ and tissue donor: A living or deceased person who authorizes transfer of anatomical material under the Uniform Anatomical Gift Act or applicable federal law, including the National Organ Transplant Act (NOTA).
Why It Matters in Research
The term donor is a false friend in historical legal sources. A researcher encountering "donor" in an eighteenth or nineteenth century English or American case is almost certainly reading about an estate-tail grantor or a power-of-appointment creator — not a charitable contributor. The property-law usage dominated legal writing until the twentieth century, and conflating it with the modern charitable or medical senses will produce misreadings.
The power-of-appointment usage is particularly important to track. Historical sources — including Kent's Commentaries, from which all four shelf sources draw — use "donor" as the technical counterpart to "donee of the power," and the distinction between the donor's intent and the donee's exercise is central to appointment law. Modern trust and estate materials have largely preserved this usage, but researchers should confirm which sense is operative in any given document.
In New York sources specifically, Burrill flags that what other jurisdictions called the "donor" of a power was termed the "grantor" under the revised statutes. Researchers working with New York materials from the nineteenth century should account for this terminological shift when cross-referencing with non-New York sources.
In contemporary law, the term has fractured across several distinct statutory regimes. Gamete donation and organ donation are each governed by their own bodies of law, with different consent structures, liability rules, and parentage or property consequences. A researcher moving between classical property materials and modern bioethics or family law materials should treat these as separate entries that happen to share a label.
Historical Dictionary Support
The four shelf sources agree on the core three-stage description: (1) old English law donor as party to a donatio of land; (2) later law donor as grantor of a fee tail; (3) modern and American law donor as conferrer of a power of appointment. All four cite Littleton § 57 and Termes de la Ley for the estate-tail meaning, and all four cite 4 Kent's Commentaries 316 for the power-of-appointment meaning. The convergence is complete — these sources were drawing from a shared tradition with no meaningful divergence on the property-law definition.
Bouvier adds a useful doctrinal note by distinguishing donum (a free gift, given from no legal necessity) from munus (a gift with a social or relational cause, as on account of marriage). This distinction is substantively important: it flags that the classical donor concept is defined by the absence of legal obligation, which is precisely what separates a gift from a contractual transfer or a payment of debt.
Burrill alone notes the New York terminological variation — the substitution of "grantor" for "donor" in the context of powers under the New York Revised Statutes — a detail the other sources omit.
None of the shelf sources address modern uses of the term in assisted reproduction, organ donation, or charitable giving law. This reflects both the era of compilation and the fact that these regimes developed through twentieth-century legislation entirely outside the common law framework the dictionaries were synthesizing.
Jurisdictional Note
In the law of powers of appointment, the donor/donee terminology is standard across American jurisdictions following the common law tradition. New York historically used "grantor" for the creator of a power, as noted in the revised statutes, though modern New York trust law has converged toward standard terminology. In assisted reproduction and organ donation law, the rights and obligations of donors vary substantially by state; researchers should consult applicable state statutes and the relevant uniform acts (Uniform Anatomical Gift Act, Uniform Parentage Act) rather than relying on the common law definition.
Encyclopedia Cross-Reference
Paternity — Assisted Reproduction and Parentage (Sperm Donors, Egg Donors, Embryos) (The Law Mind Family Law Encyclopedia)
Assisted Reproduction — Donor Gametes (Sperm, Egg, and Embryo Donation) (The Law Mind Family Law Encyclopedia)
Organ Transplantation Law — NOTA, UNOS Allocation, and Living Donor Protections (The Law Mind Health Law & Bioethics Encyclopedia)