Definition
Latin (Law Latin). In old English practice, a summoning or summons — a writ by which a party was commanded to appear before a court. The term encompasses both the act of summoning and the instrument by which that act was accomplished. Bracton describes the summonitio as a command or precept of the king requiring a person to appear before him to answer or to do something, or to produce another person to answer or do something. The form might also take the shape of a precept directed to the sheriff, commanding him to cause the named party to appear. Various kinds of summonitio existed depending on the court, the nature of the proceeding, and the relief sought.
Common Confusion
SUMMONITIO vs. CITATIO: These terms appear side by side in the maxim quoted in Coke's Institutes — "Summonitiones aut citationes nullae liceant fieri intra palatium regis" — and were treated in practice as related but technically distinct instruments. A summonitio was the broader, native common-law mechanism commanding appearance, while citatio was more closely associated with ecclesiastical and civil-law practice. In historical sources the terms are sometimes used interchangeably; researchers should not assume a hard distinction unless the source and court are clearly identified.
Why It Matters in Research
This is a historical term of art confined to old English practice. It will not appear in modern procedural rules or statutes under this name; the concept survives entirely in the modern term "summons." Researchers working in medieval and early modern English legal records — plea rolls, writs registers, Year Books, or Bracton — will encounter summonitio as a foundational procedural mechanism. Its presence signals that a proceeding was in its initiating stage.
The maxim cited in both editions of Black's — drawn from Coke's Institutes, 3 Inst. 141 — is important context: it establishes that the king's palace was a protected zone where summons and citations could not be served, a rule reflecting the sovereign immunity and dignity principles embedded in early English law. Researchers tracing the origins of sovereign immunity or parliamentary privilege doctrines may find this maxim a useful thread.
Burrill's entry is the most substantive of the three historical sources, adding the Bracton reference (fol. 333) and the Fleta citation (lib. 6, c. 6) alongside Spelman. Bracton's formulation — that the summonitio is a royal command requiring a person to appear to answer or to act — is significant because it grounds the instrument firmly in royal authority rather than purely procedural convenience. Researchers should consult Bracton and Fleta directly when working on questions of early writ practice, as both Black's editions merely reproduce the Spelman citation without the richer procedural detail that Burrill preserves.
Because the term appears in Law Latin, researchers using digitized databases of historical records should search both the Latin form (summonitio, summonitiones) and anglicized variants (sommonicio, somonicio) to capture orthographic variation common in medieval manuscripts and enrolled records.
Historical Dictionary Support
All three source dictionaries agree on the core definition and share nearly identical language, suggesting they draw from a common line of authority through Spelman's Glossarium. Burrill's is the outlier in a useful sense: it adds the Bracton and Fleta references, giving researchers two additional primary sources and a richer sense of the instrument's formal character as a royal command. The Bracton formulation — commanding a party to appear "to answer or to do something" — clarifies that the summonitio was not limited to defensive appearances but could compel affirmative action as well. This breadth distinguishes it from a narrower reading that would equate it simply with a defendant's notice to appear.
Neither edition of Black's nor Burrill's provides significant detail on the "various kinds" of summonitio Spelman identifies. Researchers needing to distinguish among forms — by court, by writ type, or by procedural posture — will need to go beyond these dictionary entries to Spelman's Glossarium Archaiologicum and the Register of Writs directly.
Jurisdictional Note
Summonitio is a term of old English common law and has no direct counterpart in American practice under that name. Civil-law systems developed parallel mechanisms under different terminology. Researchers working in Scottish, Irish, or colonial American legal history may encounter the term in records predating procedural modernization, but its practical legal significance is confined to the English common-law tradition.
Encyclopedia Cross-Reference
See Law Mind Encyclopedia: Writs (Historical); Summons; Royal Courts (Medieval English Practice)