Definition
Verification has two distinct legal meanings, one rooted in pleading procedure and one in evidentiary practice.
1. In pleading. A formal concluding formula appended to any pleading that asserts new affirmative matter. The verification is an averment by the pleading party that it stands ready to prove the truth of what it has alleged. Under common law practice, the formula traditionally appeared as a statement that the party "is ready to verify." It is not itself proof; it is a procedural declaration of readiness to prove.
2. In practice and evidence. The examination of a writing to ascertain its truth, or a certificate or affidavit attesting that a document or statement is true. In modern usage, this meaning extends to any sworn or affirmed statement confirming the accuracy of a filed document — most commonly a pleading, petition, or complaint signed under oath by the party rather than the attorney.
These two meanings are related in origin but function differently: the pleading-formula meaning is largely historical, while the sworn-attestation meaning remains active in contemporary procedure.
Common Language
Modern common usage (Wiktionary): The act or process of verifying; confirmation; authentication. Also used in mathematics for testing whether an equation correctly expresses the conditions of a problem.
Historical common usage (Webster's 1913): The act of verifying, or the state of being verified; confirmation; authentication; confirmation by evidence. Also, a formal phrase used in concluding a plea.
Webster's 1913 already reflects legal usage, which suggests the legal term had substantially shaped ordinary English by that period. The gap that matters for researchers is narrower than it appears: in everyday English, verification means any form of confirmation, including informal checking. In legal procedure, verification carries a specific structural function — either a formal pleading formula with prescribed language, or a sworn statement with legal consequences for falsification. A document that is "verified" in the legal sense has been attested under oath; one that is merely "verified" in the common sense may have been checked by any means whatsoever.
Common Confusion
Verification is frequently confused with authentication. The two are related but distinct. Authentication establishes that a document is what it purports to be — that it is genuine. Verification establishes that the contents of a document are true. Black's Law Dictionary explicitly flags this distinction, noting that a notary may verify a written statement (attest to its truth) without that act constituting authentication of the document itself. In practice, a verified pleading has been sworn to as accurate; an authenticated document has been confirmed as genuine. Researchers encountering both terms in the same source should treat them as asking different questions about different properties of the same document.
Recognized Forms
/SUBTYPES
Verified pleading. A complaint, petition, or other pleading accompanied by a sworn statement — typically signed by the party — affirming that the factual allegations are true to the best of the affiant's knowledge. Required by rule in certain proceedings (e.g., some family law, election law, and extraordinary writ contexts).
Verification by affidavit. A separate sworn instrument attached to or filed with a document to confirm its accuracy. Functionally the modern descendant of the common law pleading formula.
I-9 employment verification. A statutory and regulatory process under federal immigration law requiring employers to verify the identity and work authorization of employees. Governed by a dedicated federal form and compliance framework. Distinct in character from the pleading and evidentiary meanings — this is an administrative verification regime with its own rules and penalties.
Why It Matters in Research
Researchers face a term that has traveled across three distinct contexts — common law pleading, general evidentiary practice, and modern administrative law — and the meaning operative in any given source depends heavily on the era and context of that source.
In historical sources, verification almost always means the pleading formula. Pre-twentieth-century treatises and case reporters use the term to describe the concluding averment in a plea, not a sworn attestation in the modern sense. A researcher reading an 1850s pleading treatise who encounters "verification" should not assume it refers to a verified pleading in the contemporary sense.
In modern civil procedure, the dominant meaning has shifted to sworn attestation. Federal Rule of Civil Procedure 11 does not require verification (it requires the attorney's signature as a certification), but specific statutes and state rules do. Researchers working across state and federal sources must check which regime governs.
The immigration law meaning — I-9 verification — is entirely statutory in origin and should be treated as a term of art within that specialized corpus. It shares vocabulary with the general term but operates under a completely separate legal framework.
A recurring trap: historical sources that discuss verification in the pleading sense often describe it as a mere formal requirement, sometimes treated as surplusage if omitted. Modern sources treating a failure to verify a required pleading as a potentially dispositive defect are operating under a different legal regime. Do not conflate the two when tracing doctrine across time.
Historical Dictionary Support
The historical dictionaries converge on the pleading-formula meaning as the primary legal definition, with the evidentiary meaning treated as secondary. Burrill's is the most analytical, tracing the term to its Latin root (verificatio, from verificare) and connecting it explicitly to the concept of averment in the old books. Burrill describes verification as "an assertion of the ability of the pleader to prove the matter alleged in his plea" — a definition that emphasizes procedural posture rather than actual proof.
Rapalje & Lawrence similarly anchors the term in pleading practice, describing it as the proper concluding form for any pleading subsequent to the declaration in which new matter is alleged.
Black's (both editions) is notable for including the evidentiary meaning alongside the pleading meaning and for flagging — apparently through a case reference — the verification/authentication distinction. This is useful: it shows the distinction was already recognized as requiring explicit treatment in the early twentieth century, not merely a modern refinement.
What the historical dictionaries largely miss is the administrative verification context that emerges in the twentieth century. None of them anticipates a verification regime tied to employment, identity, or regulatory compliance. Researchers should not expect historical dictionaries to provide any useful guidance on I-9 verification or analogous administrative frameworks.
Jurisdictional Note
The requirement to verify pleadings varies significantly by jurisdiction and by type of proceeding. Federal civil practice generally does not require verification of complaints, but many states do for specific claim types (e.g., verified complaints in defamation, election contests, or domestic relations matters). The consequences of failing to verify when required also vary: some jurisdictions treat it as a waivable defect; others treat it as jurisdictional or grounds for dismissal.
Encyclopedia Cross-Reference
I-9 Employment Verification — Form Completion, Document Examination, and Reverification (Law Mind Immigration Law Encyclopedia)