Definition
An imperfect trust is an older term for an executory trust — a trust that has been declared or created but not yet fully executed, meaning the legal title to the trust property has not yet been formally conveyed to the trustee, or the trust instrument itself contemplates further acts to complete the settlement. The trust exists in equity, and a court of equity will compel its completion, but it lacks the finality of a fully executed transfer.
The term is the counterpart to an executed trust, in which all necessary acts to vest title and define the trust's terms have already been performed. In an imperfect trust, something remains to be done — a formal conveyance, a further instrument, or a settlement yet to be drawn — before the trust is complete at law.
Common Confusion
IMPERFECT TRUST / EXECUTORY TRUST: These terms are functionally synonymous in historical usage. "Imperfect trust" is simply the older or more colloquial label for what equity courts and later treatise writers standardized as "executory trust." Researchers should not read any substantive distinction between the two. Both signal the same operative condition: a trust declared but not yet perfected by the formal acts needed to complete it. The distinction that matters in research is between an executory (imperfect) trust and an executed (perfect) trust — the former invites equity to supply missing terms liberally; the latter is construed strictly as written.
IMPERFECT TRUST / RESULTING TRUST: These are unrelated concepts that can superficially appear similar when a trust fails. A resulting trust arises by operation of law when an express trust fails or when purchase money is paid by one person but title is taken in another's name. An imperfect trust is an express trust that is incomplete — not failed. The confusion is most likely in older materials where "imperfect" might loosely describe any trust arrangement that is not fully operative.
Why It Matters in Research
The term "imperfect trust" is largely extinct in modern drafting and litigation. Contemporary courts and practitioners use "executory trust" exclusively. Researchers encountering "imperfect trust" in primary sources should treat it as a direct synonym and cross-reference all executory trust materials without hesitation.
The practical significance of the underlying concept remains active even if the label is obsolete. Equity's willingness to enforce an imperfect trust — to treat the incomplete conveyance as complete in conscience — is a doctrine with real operational consequences for trust formation disputes, particularly where a settlor has declared a trust over property but died before executing a formal deed of settlement. Courts sitting in equity historically held the trust enforceable if the settlor had done everything within their own power to perfect it. That principle survives in modern trust law under various formulations.
When searching historical corpus materials, "imperfect trust" may appear in English Chancery reports and early American equity decisions through roughly the mid-nineteenth century. By the late nineteenth century, treatise writers had largely consolidated usage around "executory trust," and "imperfect trust" becomes a marginal reference term — appearing mainly in dictionary cross-references rather than in operative legal analysis.
Jurisdictional variation is minimal on the label itself, but the underlying doctrine of how far equity will go to perfect an incomplete trust varies. English Chancery doctrine was more expansive in certain periods than American courts following codification of trust law.
Historical Dictionary Support
The three shelf sources are in complete agreement: all three define imperfect trust as nothing more than a cross-reference to executory trust. Black's adds a secondary pointer to "executed" trust, which is the conceptual opposite and necessary for understanding the term in context. Rapalje & Lawrence mirrors Black's. Bouvier offers the barest entry of all, a pure redirect.
This unanimity is itself informative. It tells the researcher that as of the late nineteenth and early twentieth centuries, "imperfect trust" had already ceased to function as an independent analytical category. It survived in the dictionaries only as a navigation aid — a term a researcher might encounter in older sources that needed to be routed toward the living doctrine. None of the three shelf sources offer any substantive analysis under this heading, which confirms that the real content has always lived under "executory trust."
What the historical dictionaries do not address is the modern trust law framework that has superseded much of this terminology. The Uniform Trust Code and its state adoptions organize trust formation and completion around statutory rules that do not use either label in the way historical equity courts did.
Jurisdictional Note
The underlying doctrine — equity compelling completion of an incompletely transferred trust — was developed primarily in English Chancery and carried into American equity jurisprudence. States that have enacted the Uniform Trust Code may address incomplete trust transfers through statutory provisions rather than purely equitable doctrine, though the equitable principles are rarely abrogated entirely.
Encyclopedia Cross-Reference
The Law Mind Trusts, Estates & Probate Encyclopedia, estates_67: Resulting Trusts — Purchase-Money and Failure-of-Express-Trust Resulting Trusts (relevant for distinguishing imperfect trusts from trusts that have actually failed and give rise to a resulting trust).