Definition
A writ of medieval English law by which a person who had been threatened with death or bodily harm could compel the threatening party to appear before a court and provide security that the threatened person would be kept safe. The name translates literally as "security of the peace." The writ was a formal legal mechanism for addressing credible threats before any violence had actually occurred, requiring the person making the threats to give surety — typically by entering a bond with pledges — that they would keep the peace toward the complainant.
Common Confusion
The term is easily confused with the general concept of surety of the peace or with the broader range of peace-related recognizances. The writ of seguritatis pacis was the procedural vehicle to initiate the process; the surety of the peace was the substantive obligation that resulted. A party who had already threatened violence might also be subject to proceedings in the nature of a writ of supplicavit, another related mechanism available in certain circumstances. Researchers should be careful not to assume that all historical references to peace security or peace-keeping obligations proceeded through this specific writ.
Why It Matters in Research
This is a historical writ of old English law with no direct modern equivalent as a named writ. Researchers encountering this term in early English legal records, plea rolls, or original registers should understand it as a precursor to the modern recognizance to keep the peace and, more distantly, to contemporary restraining orders and injunctions against harassment. The writ belongs to a family of peace-related writs and processes that evolved over centuries into different procedural forms; tracing a client's historical dispute across this evolution requires knowing both the old Latin writ names and their functional descendants.
The primary research trap is conflating this writ with the broader concept of surety of the peace, which could be obtained through several different procedural routes in historical practice. The writ of seguritatis pacis was one specific mechanism; the surety itself was the outcome. Historical documents may use the terms interchangeably or imprecisely.
Because Black's (2nd Ed.) source cites Reg. Orig. 88 — a reference to the Registrum Omnium Brevium, the register of original writs — researchers working with early English common law sources should consult that register directly for the full procedural form of the writ. The Registrum Omnium Brevium was a foundational reference work in English legal practice and its entries reflect the formal language and scope of writs as they were actually issued by Chancery.
Historical Dictionary Support
Black's Law Dictionary (2nd Ed.) provides the only dictionary entry identified in the Law Mind corpus for this term. The definition is spare but accurate: it identifies the writ as operating against a person who threatened death or bodily harm, triggered by the complaint of the person threatened, and grounded in the Registrum Omnium Brevium. Historical dictionaries generally treat this term briefly, reflecting its status as a relatively narrow procedural writ rather than a substantive legal concept. No meaningful divergence appears across available sources, though the brevity of the coverage means that nuances of practice — such as what level of threat was sufficient to obtain the writ, or how the required security was calculated — are not addressed in the dictionary literature and must be sought in primary sources and treatises on early English practice.
The Latin name itself is instructive as a research aid: Latin writ names were standardized in English chancery practice, and variations in spelling (pacis vs. paois, the latter appearing to be a transcription artifact) should not be treated as evidence of a distinct writ. Researchers will encounter spelling inconsistencies in digitized historical sources.
Jurisdictional Note
This writ was a creature of the English common law and had no direct equivalent in civil law jurisdictions. Its influence on American colonial and early state practice was limited and indirect. Modern American peace bond statutes and civil harassment injunctions are functional descendants of the underlying concept, but not of this specific writ form.