Definition
Evidence that is admissible as a substitute for better, more direct evidence when that primary evidence is unavailable — because it has been lost, destroyed, or is otherwise beyond the party's reach. The classic example is oral testimony recounting the contents of a document that no longer exists, offered in place of the document itself.
Secondary evidence is not inherently inferior in credibility; its admissibility is simply conditioned on a satisfactory showing that the primary evidence cannot be produced. Once that foundation is laid, secondary evidence of the relevant fact may be offered freely. The law does not ordinarily rank secondary evidence internally — a recollection from memory is treated no differently from a copy, provided primary evidence is genuinely unavailable.
Common Confusion
SECONDARY EVIDENCE vs. HEARSAY. These concepts overlap in practice but are analytically distinct. Secondary evidence doctrine addresses the form in which evidence is presented — a substitute for an unavailable original. Hearsay doctrine addresses the declarant and purpose of an out-of-court statement. Oral testimony about a lost document may implicate both rules simultaneously, but solving the secondary evidence problem (by showing the original is unavailable) does not automatically solve a hearsay problem with the same testimony.
SECONDARY EVIDENCE vs. BEST EVIDENCE RULE. These terms are paired but not synonymous. The best evidence rule is the affirmative requirement that, when proving the contents of a writing, the original must be produced. Secondary evidence is what becomes admissible once a party satisfies the court that the original cannot be produced. One is the rule; the other is the exception it permits.
Core Elements
For secondary evidence to be admitted, the proponent must generally establish:
1. Existence of primary evidence. There must have been an original document, instrument, or record to begin with.
2. Unavailability of primary evidence. The original must be shown to be lost, destroyed, or otherwise inaccessible — not merely inconvenient to produce. Courts require a good-faith, diligent search or a credible accounting for the absence.
3. Sufficiency of the foundation. The judge decides whether the showing of unavailability is satisfactory before secondary evidence is admitted. Until that ruling is made, secondary evidence is not properly before the fact-finder.
4. No degrees within secondary evidence. Once the foundation is met, the law does not further rank substitutes against each other. A copy and a recollection from memory stand on equal footing as admissible secondary evidence.
Why It Matters in Research
The term appears primarily in evidentiary and procedural contexts and is closely bound to the best evidence rule — which means its practical relevance has shifted considerably with the adoption of the Federal Rules of Evidence in 1975 and parallel state codifications. Modern evidence codes (particularly FRE 1002–1004) absorbed and substantially restated the common law secondary evidence doctrine without always using that exact phrase. Researchers working in pre-codification sources, state common law jurisdictions, or non-U.S. legal systems will encounter the classical formulation much more directly.
A notable trap in historical sources: Rapalje & Lawrence's observation that "there are no degrees of secondary evidence" was a contested point in nineteenth-century American and English practice. Some older treatises and cases suggest a hierarchy — certified copies preferred over uncertified copies, copies over memory — and courts occasionally imposed such rankings. Do not assume uniformity across jurisdictions or eras on this point.
In documentary production disputes, arbitration proceedings, and international commercial matters, the secondary evidence concept retains force even where modern evidence codes govern, because those settings often involve contested document availability and authentication problems that track the classical analysis closely.
The term also appears, with different freight, in administrative and veterans law contexts — "secondary" describes a service-connected condition that arose from another service-connected condition, a usage entirely unrelated to evidence doctrine. Researchers crossing between practice areas should be alert to this disambiguation.
Historical Dictionary Support
The four shelf sources converge on the essential structure: secondary evidence is the next-best substitute, admissible only after an adequate account for the primary evidence's absence. Burrill is the most precise on the mechanism, specifying that the instrument itself is the best evidence "the nature of the case will admit" and that parol evidence is the usual secondary form. Black's adds the oral-recital example explicitly. Bouvier emphasizes the fraud-prevention rationale underlying the primary evidence preference — a useful doctrinal anchor.
Rapalje & Lawrence stands out for its categorical statement that no degrees exist within secondary evidence, which other sources treat as less settled. Bouvier's entry is incomplete in the corpus fragment provided but signals that secondary evidence "includes" further subcategories — suggesting Bouvier recognized more internal structure than Rapalje & Lawrence allowed. This divergence is worth flagging when reconstructing the nineteenth-century common law picture.
None of the historical sources fully anticipates the codification story: how the Federal Rules reframed the best evidence doctrine around "originals" and "duplicates" rather than the primary/secondary binary. Researchers should treat these entries as windows into the common law baseline rather than statements of current doctrine.
Jurisdictional Note
Most U.S. jurisdictions have absorbed the substance of secondary evidence doctrine into statutory evidence codes, with FRE 1004 as the federal baseline. Some states retain the classical common law terminology more explicitly. English and Commonwealth jurisdictions use the primary/secondary evidence vocabulary more persistently in both case law and scholarship.
Encyclopedia Cross-Reference
The encyclopedia entries tagged in this corpus — child support, veterans service connection, and assumption of risk — do not address secondary evidence in the evidentiary sense. No matching encyclopedia cross-reference applies here.