Definition
Latin: "He appeared at the day." A common law plea entered in an action of debt on a bail bond, asserting that the defendant fulfilled the condition of the bond by appearing in court on the required day. The plea operated as a complete defense to the creditor's or surety's action: if the defendant in fact appeared as required — specifically, by putting in bail according to the bond's condition — then the bond obligation was satisfied and no debt was owed. The plural form, comperuerunt ad diem ("they appeared at the day"), applied when multiple defendants were named in the same action.
Why It Matters in Research
This term surfaces in historical common law pleading records, particularly in English practice materials from the late eighteenth and early nineteenth centuries. Researchers working with bail bond litigation, suretyship records, or early American civil procedure materials should treat this as a term of art belonging to a highly technical and now-obsolete pleading system.
The key navigational point: comperuit ad diem is a plea in an action of debt — not a plea in the underlying criminal or civil proceeding that generated the bail bond. The procedural posture matters. When a defendant failed to appear, the surety became liable on the bond; the creditor could then bring an action of debt to collect. Comperuit ad diem was the surety's or defendant's counter-assertion that no default occurred. Researchers who encounter the term without this procedural context may misread the record as being about the primary action rather than this secondary enforcement proceeding.
Because the term belongs to the formal plea system abolished in England by the Common Law Procedure Acts of the 1850s and replaced in American jurisdictions by code pleading reforms beginning with the New York Field Code of 1848, it will rarely if ever appear in post-mid-nineteenth-century materials. A researcher finding this term in a document can use its presence as a rough dating signal: the document likely predates the procedural reform era in that jurisdiction.
Corpus connections: researchers tracing bail practice will find this term clustered with related bail bond pleadings and should cross-reference materials on special pleading generally, the forms of action in debt, and the distinct but adjacent practice of estreating a recognizance.
Historical Dictionary Support
The four source dictionaries are in close agreement on the core meaning, with Burrill's entry being the most substantively useful. Burrill alone supplies the procedural mechanism — that "appearing" meant specifically putting in bail according to the bond's condition, not merely presenting oneself — and cites Tidd's Practice and a Taunton reporter case (6 Taunt. 167) to anchor the usage. The Tidd citation (1 Tidd's Pr. 310, 318) is significant: Tidd's Practice was the standard English civil procedure treatise of the period and would be the researcher's primary point of departure for understanding the full pleading context.
Black's (both editions) and Rapalje & Lawrence give compressed definitions that are accurate but skeletal. None of the sources discuss the substantive burden on the pleader, the replication that would follow a successful plea, or the fate of the action if the plea failed. Researchers who need that procedural depth should move from these dictionary entries directly to Tidd or equivalent American practice treatises (such as Gould's Pleading or Stephen on Pleading) rather than expecting the dictionary entries to carry that weight.
Burrill's plural form — comperuerunt ad diem — is not mentioned in the other sources and represents a genuine addition to the record.
Jurisdictional Note
This is an English common law plea form. American courts operating under common law pleading adopted it, but its practical relevance is confined to jurisdictions and periods before code pleading reforms took hold. By the latter half of the nineteenth century, the plea had largely disappeared from American practice as the forms of action were abolished.