Definition
Per formam doni (Latin: "by the form of the gift") is a principle of English property law holding that a donee takes land precisely as the donor specified in the original grant — according to the donor's designated limitations — rather than by any default operation of law. The phrase captures how a fee tail estate was understood to descend: not freely alienable or subject to the common law rules of inheritance applicable to a fee simple, but strictly channeled through the line of heirs the donor named or contemplated at the time of the gift. The estate passed to the issue of the grantee in the form the donor gave it, reverting to the donor (or the donor's heirs) if that line failed.
Why It Matters in Research
This phrase is encountered almost exclusively in historical English land law sources and in American materials treating fee tail estates and their statutory transformation. Researchers need to understand it as an explanatory term rather than an operative one: no deed or instrument of record will typically use "per formam doni" as an active conveyancing phrase. It appears instead in treatises and commentary to explain why fee tail estates behaved differently from fee simple estates under the common law before and after the Statute De Donis Conditionalibus (1285).
Two research traps are common. First, the phrase is tightly bound to the now-abolished or transformed fee tail, so its appearance in a source signals you are reading about either pre-De Donis conditional fees, the fee tail proper, or the Formedon action — and the historical moment matters enormously to interpretation. Second, American sources using this term nearly always import English doctrine by analogy; the extent to which any American jurisdiction actually recognized per formam doni descent depends on local reception of the common law and local fee tail legislation. Many American states converted or abolished the fee tail early, and treatise discussions of per formam doni in American legal literature are often theoretical rather than descriptive of local practice.
The phrase also surfaces in discussions of Formedon, the writ used to recover land held in fee tail when the per formam doni succession was breached. If your research involves Formedon, understanding per formam doni is prerequisite.
Historical Dictionary Support
All three source dictionaries — Black's (1st and 2nd editions) and Burrill — give essentially identical entries, each citing Blackstone's Commentaries at 2 Bl. Comm. 113 and 191. The uniformity signals that these dictionaries are themselves derivative of Blackstone rather than independent analytical sources. Burrill adds the cross-reference to Formedon, which is the more practically useful pointer for research purposes.
What the historical dictionaries do not supply is context: they define the phrase accurately but tersely, without explaining the Statute De Donis, the mechanics of fee tail descent, or the relationship to the common recovery that was used to defeat per formam doni limitations in practice. A researcher relying solely on the dictionary entries would know what the phrase means but not why it mattered or how it functioned within the larger system of real property law. Blackstone's own treatment at the cited pages remains the foundational primary source.
Jurisdictional Note
Per formam doni is English common law doctrine. In the United States, its relevance depends entirely on a jurisdiction's reception of the fee tail. Most American states abolished or converted fee tail estates by statute, often treating any grant that would have created a fee tail as a fee simple instead. Where that occurred, per formam doni has no operative role and appears only in historical commentary.
Encyclopedia Cross-Reference
See Law Mind Encyclopedia: Fee Tail; Formedon; De Donis Conditionalibus; Estates in Land (Historical)