Definition
A Latin term from old English law meaning "common writing" — a written instrument executed in duplicate or bipartite form, with each party retaining a copy of the same document. The term is closely associated with the chirograph, the standard medieval mechanism for producing such instruments: a single document was written out twice on one sheet of parchment, the word CHIROGRAPHUM (or a similar phrase) inscribed between the two copies, and the sheet then cut through that inscription so that each party held a half. The matching cut edges, when brought together, could verify the authenticity of both parts. Communis scriptura captures the conceptual core of this arrangement — the writing belongs equally to both parties and memorializes their mutual agreement.
Common Confusion
Communis scriptura and chirograph are not synonyms, though historical dictionaries treat them as interchangeable and the same Glanvill citation appears under both. Communis scriptura describes the character of the instrument — a writing held in common — while chirograph describes the physical method of its production and authentication (the cut sheet). A chirograph was always a communis scriptura; but the phrase communis scriptura could in principle describe any document common to both parties, not only one produced by the chirograph technique. Researchers should not assume the two terms are fully coextensive when interpreting a medieval source.
Why It Matters in Research
This is an archaic term of limited operational significance in modern legal research, but it appears with some frequency in medieval English legal records, conveyancing history, and scholarship on early contract formation. Several research traps are worth noting.
First, the term survives almost exclusively in its Latin form. English-language digests and abridgments from the sixteenth century onward translate or paraphrase it; searching historical corpus materials for the Latin phrase will surface a narrower band of sources than searching for chirograph or indenture.
Second, the doctrinal significance of the "common writing" concept bears on the history of written evidence and the authentication of instruments. The bipartite form was not mere formality — it was a fraud-prevention technology. Understanding communis scriptura in this functional sense aids interpretation of early cases concerning the proof and enforceability of written agreements.
Third, researchers working in equity or early chancery materials should note that disputes over which party held the original, or whether the cut edges matched, could be dispositive. The term therefore connects to the evidentiary history of documents as well as to conveyancing practice.
Fourth, the corpus connection to Glanvill (Tractatus de Legibus et Consuetudinibus Regni Angliae, Book 8, Chapter 1) is significant: this is one of the earliest systematic treatments of English private law, and the passage on communis scriptura is among the earliest English-language discussions of documentary evidence in property transactions. Any extended research into medieval conveyancing will need to engage with that text directly.
Historical Dictionary Support
Black's Law Dictionary (all editions consulted), Burrill's Law Dictionary, and Black's 2nd edition are in complete agreement: all three define communis scriptura as "a common writing; a writing common to both parties; a chirograph," and all three cite Glanvill Book 8, Chapter 1 as the sole authority. The unanimity here reflects the term's narrow and stable meaning rather than any independent research by the lexicographers — it is likely that later dictionaries simply carried forward the entry verbatim.
What the historical dictionaries do not supply is any functional or procedural context: they identify the term but do not explain why the bipartite form mattered, how disputes about such instruments were resolved, or how the concept evolved (or disappeared) as formal deed execution practices changed. Researchers should supplement these entries with primary sources in medieval legal history and with Glanvill directly.
Jurisdictional Note
The term is specific to old English law and has no recognized modern equivalent in any common law jurisdiction. It does not appear in American legal usage and carries no operative legal meaning in contemporary practice.