Definition
An attestor is a person who witnesses the signing of a legal instrument and adds their own signature to confirm that the signing occurred. The attestor does not vouch for the truth of the document's contents — only that the principal party executed it in the attestor's presence. The role is most commonly encountered in the execution of wills, deeds, powers of attorney, and other formal instruments that require witnessed signatures to be legally effective.
Common Language
Modern common usage (Wiktionary): One who attests.
Historical common usage (Webster's 1913): No entry for attestor; the root "attest" was defined as to bear witness to, to certify, or to affirm as true.
The gap matters. In ordinary English, to attest suggests personal vouching for the truth of a matter. In legal usage, the attestor's role is strictly procedural: the attestor confirms the act of signing, not the accuracy or validity of what was signed. A witness to a will, for example, attests to the testator's signature and apparent capacity — not to whether the will reflects the testator's true wishes.
Common Confusion
ATTESTOR vs. NOTARY PUBLIC: These roles are frequently conflated but are legally distinct. A notary public is a public officer who administers oaths, takes acknowledgments, and certifies documents under state authority. An attestor is simply a private witness to execution. Many instruments require one or the other; some require both. An attestor's signature does not substitute for notarization, and a notary does not necessarily fulfill the function of an attesting witness unless the relevant statute or instrument requires witnesses specifically.
ATTESTOR vs. SUBSCRIBING WITNESS: The terms are often used interchangeably, but subscribing witness has the more precise meaning — a person who signs their name to an instrument specifically to attest to its execution. All subscribing witnesses are attestors; not all attestors formally subscribe (though in practice the distinction rarely affects research).
Why It Matters in Research
Attestor is a thin entry in most historical dictionaries, including Bouvier's, which directs researchers immediately to the related terms ATTEST, ATTESTATION, and ATTESTING WITNESS. Researchers should follow those cross-references rather than treating the attestor entry as self-contained.
The functional requirements imposed on an attestor vary significantly by instrument type and jurisdiction, and those requirements are embedded in statutory law rather than common law doctrine. Research into whether a particular attestation was legally sufficient almost always requires consulting the governing statute for the specific instrument — a Wills Act provision, a real property recording statute, or a healthcare proxy law — not the dictionary definition of the role.
In historical sources, attestor and attesting witness are often used interchangeably. When reading older instruments or case law, pay attention to whether the source is describing the act of witnessing (the function) or the signature requirement (the formal element). Courts have sometimes voided instruments where the number of attestors was insufficient or where an attestor had a disqualifying interest — research into those disputes requires moving quickly from the definitional term to the underlying statute and case law.
Historical Dictionary Support
Bouvier's entry for attestor is deliberately minimal — a one-line definition pointing outward to ATTEST, ATTESTATION, and ATTESTING WITNESS, where the substantive legal doctrine resides. This structure reflects Bouvier's general approach: the agent noun (attestor) is defined by reference to the act (attest) and its legal consequences (attestation). No significant divergence exists between Bouvier's treatment and modern usage, though Bouvier's cross-reference to the Standard Dictionary signals that even nineteenth-century legal lexicographers considered attestor a term whose full meaning required consultation of companion entries.
Jurisdictional Note
Requirements governing who may serve as an attestor — including minimum age, disqualification of beneficiaries, and number of witnesses required — are set by statute and vary by state and instrument type. Wills in particular are subject to widely divergent witness requirements across jurisdictions, and some states have adopted the Uniform Probate Code while others have not.