Definition
A procedure from old English law in which the authenticity of a seal was tested by direct physical comparison with another seal known to be genuine. The term translates literally from Latin as "comparison of marks" or "bringing together of signs." The method was used to detect forgery or alteration of sealed instruments at a time when the seal, rather than a signature, served as the primary means of authenticating a document and binding its maker to its terms.
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Why It Matters in Research
COLLATIO SIGNORUM is a term of purely historical significance. It appears in medieval English legal sources and surfaces in law dictionaries as a bridge to early doctrines of authentication and documentary evidence. Researchers working in pre-modern English legal history — particularly the development of the law of sealed instruments, deeds, and proof of execution — will encounter this term in contexts that predate both modern signature requirements and notarial authentication.
The critical navigational point is that this procedure belongs to an era when the seal was legally operative in itself: it was not merely evidence of execution but the act of execution. COLLATIO SIGNORUM was therefore not a secondary evidentiary step but a primary mechanism for resolving disputes about the identity or authority of the sealing party. Researchers tracing the evolution of documentary authentication should treat this term as a marker of that older framework.
Both Black's editions cite Bracton (Bracton, De Legibus et Consuetudinibus Angliae) as the primary source. Researchers should go directly to Bracton for the doctrinal context; the dictionary entries are thin summaries. The folio citation varies slightly between editions (fol. 389b in the first, fol. 389b in the second — a minor transcription inconsistency), so verify against the manuscript or a reliable modern edition of Bracton.
No modern procedural analogue uses this term. Contemporary authentication of documents operates under evidence codes, notarial law, and digital authentication frameworks that have entirely supplanted the seal-comparison procedure. The term will not appear in modern case law or statutes.
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Historical Dictionary Support
Both Black's editions are in agreement on substance: COLLATIO SIGNORUM was a comparison of marks or seals to test genuineness, citing Adams and Bracton. The entries are nearly identical across editions, with no substantive evolution in the definition between them. The brevity of both entries reflects that the term was already archaic by the time Black's was first compiled; neither edition elaborates on procedural mechanics, the legal standard for a successful comparison, or what consequences followed a finding of forgery.
What the historical dictionaries do not supply: any account of who conducted the comparison (a court officer, a jury, the judge), what evidentiary weight the comparison carried, or how the procedure interacted with wager of law or other early English proof mechanisms. Bracton is the necessary next stop for that depth.
The reference to "Adams" in both editions likely points to a legal treatise on evidence or equity procedure, though the citation is given without sufficient detail to identify the work with certainty. Researchers should not rely on this citation without independent verification.
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Jurisdictional Note
This procedure is specific to old English law and has no recognized parallel in American, Scottish, or continental legal traditions. It is not a term of art in any current jurisdiction.
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