Definition
Casual evidence is evidence that happens to be available to prove a fact or event — not because it was prescribed, required, or arranged in advance, but simply because it exists and can be adduced. It stands in contrast to pre-appointed evidence, which is evidence formally designated by statute or prior agreement to serve as proof of a particular fact.
The distinction is one of origin rather than quality. Casual evidence is organic: a witness who happened to observe an event, a document that happens to record a relevant transaction, a piece of physical material that happens to bear on the issue. Pre-appointed evidence, by contrast, is institutionally mandated: a statute might require that a marriage be proved only by a certified register entry, or that a corporate resolution be proved only by board minutes. When such a requirement exists, casual evidence — however compelling — may be legally insufficient or inadmissible to establish the designated fact.
Common Confusion
CASUAL EVIDENCE vs. PRE-APPOINTED EVIDENCE: The contrast is the entire point of the term. Researchers encountering "casual evidence" in historical legal texts should read the phrase as a technical term of classification, not a qualitative judgment about the reliability or weight of the evidence. "Casual" here means incidental in origin, not careless or unreliable. Pre-appointed evidence systems were far more common in older common law practice (particularly in matters of status, title, and record) than in modern litigation, which is why the distinction appears prominently in 19th-century sources but rarely in contemporary practice guides.
Why It Matters in Research
This term is largely a 19th-century evidentiary taxonomy that has faded from active use in modern American and English practice. Researchers are most likely to encounter it in historical treatises, older editions of evidence hornbooks, and judicial opinions from the 1800s discussing best evidence rules, status proof (marriage, legitimacy, death), or documentary requirements under early statutory schemes.
Key navigational points:
First, the term does not appear as a live category in modern Federal Rules of Evidence or their state equivalents. The conceptual work once done by the casual/pre-appointed distinction is now handled through specific rules on authentication, best evidence, and statutory requirements for particular kinds of proof. Do not expect to find "casual evidence" as an operative term in post-1970 American case law.
Second, the distinction is most relevant when researching historical proof requirements for matters of civil status or public record — areas where legislatures historically prescribed exclusive modes of proof. A researcher tracing the evidentiary history of how courts required marriage to be proved, for example, will find the casual/pre-appointed framework doing real analytical work in older sources.
Third, when this term appears in older judicial opinions, it is almost always invoked to explain why certain evidence was rejected: the court will note that the fact in question required pre-appointed evidence, and that the casual evidence offered, however credible, was legally insufficient. Understanding the term clarifies why courts in earlier periods excluded apparently probative material on formal grounds that look strange to modern readers.
Fourth, the Rapalje & Lawrence entry contains an obvious transcription error ("arranged beforeby rats, is bound to have cats on board") — a typesetting corruption in the original or a reproduction artifact. Researchers encountering this in digitized sources should recognize it as noise, not doctrine. The clean text reads: "otherwise arranged beforehand to be the evidence of the fact or event."
Historical Dictionary Support
Both Black's Law Dictionary and Rapalje & Lawrence attribute the substance of this definition to Brown — likely Brown's Law Dictionary or a related 19th-century treatise — and their definitions are nearly identical in substance. This convergence indicates the term had settled meaning within the Anglo-American evidence tradition by the mid-to-late 1800s, derived from a shared source rather than independent development.
Neither source discusses the term at length, which is itself informative: "casual evidence" functioned as a definitional label within a larger taxonomy, and its meaning depended entirely on understanding its counterpart, pre-appointed evidence. It was not a standalone doctrinal category with its own body of case law but rather a descriptive contrast term used in treatise exposition.
Neither dictionary addresses how courts actually adjudicated conflicts between casual and pre-appointed evidence, or what consequences followed from offering the wrong type. Researchers needing that operational layer will need to consult primary sources and period treatises on evidence directly.
Jurisdictional Note
The casual/pre-appointed distinction derives from English common law and was carried into American legal literature through treatise tradition. Its practical significance varied by jurisdiction depending on which statutory proof requirements were in force. No uniform American rule governed when pre-appointed evidence was required.
Encyclopedia Cross-Reference
The Law Mind Criminal Law Encyclopedia: Rules of Evidence in Criminal Cases (Overview) [criminal_207]
The Law Mind Criminal Law Encyclopedia: Pretrial Motions — Motion to Suppress Evidence [criminal_199]