Definition
To sign, as a legal act, means to affix one's name or mark to a written instrument for the purpose of authenticating it, expressing assent, or giving it legal effect as one's own act. The term carries three distinct meanings depending on context:
1. As a verb (execution of instruments): To sign is to attach one's name or authorized mark to a document — whether by handwriting, stamp, electronic means, or other recognized method — with the intention that the signature authenticate the document or bind the signer. This is the dominant legal usage.
2. As a noun (physical or regulatory object): A sign is a physical display, board, or structure bearing letters, symbols, or images and erected to convey information, advertise, or identify a business or location. In this sense, "sign" appears primarily in zoning, land use, and municipal regulation law.
3. As a noun (evidentiary or circumstantial indicator): In older legal usage, particularly in evidence and medical-legal contexts, a "sign" may refer to an observable indication or manifestation — as distinguished from a symptom, which is subjective. This usage is now largely confined to forensic and medical jurisprudence.
The verb form — signing as the act of execution — is by far the most frequently encountered meaning in legal documents, statutes, and case law.
Common Language
Modern common usage (Wiktionary): A visible fact that shows that something exists or may happen; a mark or symbol used to represent something; a physical board or display bearing information.
Historical common usage (Webster's 1913): That by which anything is made known or represented; that which furnishes evidence; a mark; a token; an indication; a proof; also, a remarkable event or omen.
The ordinary language of "sign" covers a wide range of meanings — omen, symptom, signal, physical placard — that rarely carry legal weight. In legal usage, the verb "to sign" is a term of art focused narrowly on the act of execution and authentication of instruments. The critical legal question is not merely whether a name appears on a document, but whether it was placed there with the requisite intent to authenticate or bind. That intent element is invisible in common usage.
Common Confusion
SIGN vs. SUBSCRIBE: Historical sources, including Black's, draw a deliberate distinction. To subscribe is to write one's name at the foot or bottom of an instrument — a specific positional requirement. To sign carries no such positional constraint; a name or mark placed anywhere on a document, with authenticating intent, may constitute a valid signature. Statutes requiring a writing to be "subscribed" are therefore narrower than those requiring it to be "signed." Researchers working with older wills, deeds, and statutory instruments must pay close attention to which word the governing statute uses, as courts have treated the distinction as dispositive.
SIGN vs. EXECUTE: "Execute" encompasses the full set of formalities required to give an instrument legal effect — signing, sealing, witnessing, acknowledgment, and delivery where required. "Sign" refers only to one step in that process. An instrument may be signed but not executed if other required formalities are absent.
Core Elements
For the act of signing to satisfy a legal requirement, courts and statutes generally look for:
1. Identity: The mark or name must be attributable to the party claimed as the signer, whether written personally or affixed through an authorized agent or mechanical means.
2. Intent to authenticate: The name or mark must be placed on the document with the purpose of authenticating it or adopting it as the signer's act — not merely as a casual notation or incidental reference.
3. Compliance with applicable form requirements: Some instruments require a handwritten signature; others permit electronic, stamped, or facsimile signatures. The governing statute or rule determines what form suffices.
Why It Matters in Research
The deceptive simplicity of "sign" masks significant research complexity. Several areas demand careful attention:
Electronic signatures have substantially expanded what counts as a valid "sign." The Electronic Signatures in Global and National Commerce Act (E-SIGN) and the Uniform Electronic Transactions Act (UETA) — both enacted in 2000 — provide that an electronic sound, symbol, or process attached to a record with signing intent satisfies any legal requirement for a signature. Researchers using pre-2000 sources should not assume that digital or electronic signing methods were recognized or valid under the law being examined.
Wills and statutes of frauds present the sharpest historical traps. Requirements that a will or conveyance be "signed" have generated extensive case law on whether initials, a stamped name, a mark made by a third party at the testator's direction, or a name printed elsewhere on the form constitutes a valid signature. Results vary sharply by jurisdiction and era. A source from one state's mid-nineteenth-century case law may be directly contradicted by another state's rule.
Sign ordinances (noun usage) occupy an entirely separate body of law. Municipal regulation of signs — their size, lighting, placement, and content — implicates First Amendment doctrine, zoning authority, and aesthetic regulation principles. Content-based restrictions on signs receive heightened constitutional scrutiny. Researchers conflating the verb and noun usages will find themselves in unrelated bodies of doctrine.
The Anderson's entry in the source material is a non-responsive entry (it defines "side of the court"), confirming that even established dictionaries sometimes misfire on short, common terms. Researchers should triangulate across sources rather than relying on a single dictionary for foundational terms.
Historical Dictionary Support
Black's (1st and 2nd editions) and Bouvier agree on the core legal meaning: to sign is to write one's name or affix a mark anywhere on a document with authenticating intent, and this is explicitly distinguished from subscribing, which requires placement at the foot of the instrument. Bouvier extends the definition further, incorporating the principle that signing may be accomplished by causing one's name to be affixed — recognizing authorized agency — and grounding the intent requirement in the method of impression rather than the physical act alone. This formulation anticipates, in embryonic form, the logic later codified in E-SIGN and UETA.
What the historical dictionaries do not address is the electronic dimension, which is expected given their vintage, but researchers should note the gap is doctrinal, not merely technological. The historical sources also underemphasize the intent element as an independently litigated issue; modern case law has made intent to authenticate a significant battleground, particularly in disputes over whether a printed name on a form, a facsimile stamp, or a name in an email header constitutes a legally effective signature.
Jurisdictional Note
Requirements for what constitutes a valid signature vary by document type and jurisdiction. Wills are particularly variable: some states require that the testator sign at the end of the will; others permit a mark or signature anywhere. Electronic signature law is broadly harmonized through E-SIGN and UETA, but state enactments of UETA contain variations, and some document types — including wills, codicils, and certain family law instruments — were historically excluded from electronic signature statutes, though several states have since amended their laws to permit electronic wills.
Encyclopedia Cross-Reference
Contracts — Clickwrap, Browsewrap, and Electronic Contract Formation (UETA, E-SIGN) (The Law Mind Contracts & Commercial Law Encyclopedia)
Property — Zoning: Aesthetic Regulation and Sign Ordinances (The Law Mind Property Law Encyclopedia)