Definition
Indorsement is the act of writing one's name on the back of a negotiable instrument — such as a promissory note, bill of exchange, or check — by which the holder assigns and transfers the property in that instrument to another. The term refers both to the act of signing and to the writing itself. An indorsement may consist of a signature alone or may include qualifying words that limit the indorser's liability or restrict further transfer.
Three core functions are served by an indorsement: (1) it negotiates the instrument, passing title to the transferee; (2) it creates a secondary liability on the indorser, who may be held responsible for payment if the primary obligor defaults; and (3) depending on its form, it dictates the conditions under which the instrument may be further transferred.
Although the back of the instrument is the conventional location, an indorsement written on the face of the instrument or on an attached slip (an allonge, used when the back lacks space) is legally effective.
Common Language
Modern common usage (Wiktionary): Alternative spelling of endorsement — the act of writing on the back of a note, bill, or other instrument; also, broader general-language use meaning public approval or support of a person or product.
Historical common usage (Webster's 1913): The act of writing on the back of a note, bill, or other written instrument; that which is so written, including a name, an order for or receipt of payment, or an officer's return.
The common-language and legal meanings are closely aligned in origin — both center on signing the back of a financial document. The gap opens in two directions. First, modern general usage has expanded "endorsement" to cover celebrity product approval and political support, meanings entirely absent from the legal term. Second, the legal term carries precise technical consequences — negotiation of title, secondary liability, restrictions on further transfer — that the ordinary sense of "signing the back of a check" does not convey. A researcher encountering "indorsement" in historical commercial law sources should not conflate it with the looser modern endorsement vocabulary.
Common Confusion
INDORSEMENT VS. ENDORSEMENT
Both spellings refer to the same legal concept. "Indorsement" is the traditional legal spelling, dominant in older statutes, case law, and all historical dictionary sources. "Endorsement" is the modern general and increasingly preferred legal spelling, adopted in the Uniform Commercial Code. In historical sources, "indorsement" is standard; in modern commercial law contexts, "endorsement" predominates. The spellings are interchangeable in substance but era-specific in usage — researchers searching historical corpus materials should run both spellings.
Recognized Forms
/SUBTYPES
BLANK INDORSEMENT: The indorser signs only their name, without naming a specific transferee. The instrument thereby becomes payable to bearer and may be negotiated by delivery alone without further indorsement.
SPECIAL INDORSEMENT (FULL INDORSEMENT): Names a specific person to whose order the instrument is payable. Further negotiation requires that person's indorsement.
RESTRICTIVE INDORSEMENT: Limits the purposes for which the instrument may be used or further transferred (e.g., "for deposit only"). Restricts the indorsee's ability to negotiate the instrument further.
QUALIFIED INDORSEMENT: Adds words such as "without recourse," by which the indorser disclaims secondary liability. The instrument is still negotiated, but the indorser cannot be held if the primary obligor fails to pay.
CONDITIONAL INDORSEMENT: Makes the indorser's liability contingent on the occurrence of a specified event.
ACCOMMODATION INDORSEMENT: An indorsement by a party who signs to lend their name and credit to the instrument for the benefit of another party, without receiving value themselves.
Why It Matters in Research
Researchers working in the Law Mind corpus will encounter "indorsement" primarily in three contexts: commercial law disputes over negotiable instruments, banking and financial records, and pleading materials addressing liability chains on bills and notes.
Several navigational points matter. First, the spelling split is a genuine search hazard. Historical materials use "indorsement" almost exclusively; UCC-era and modern materials increasingly use "endorsement." Any corpus search should include both forms. Second, the liability consequences of indorsement type are legally significant: whether an indorsement was blank, special, qualified, or restrictive determines who can sue whom and on what basis. Historical cases turning on indorser liability frequently hinge on which form was used. Third, Rapalje & Lawrence's entry focuses on blank indorsement in the context of innocent indorsee recovery — a specific doctrinal issue that was heavily litigated and that points toward the bona fide purchaser framework intersecting with negotiable instrument law. Researchers tracing that doctrine should connect indorsement to holder-in-due-course analysis.
Fourth, Anderson's Dictionary of Law flags a non-obvious point: indorsement by placement on the face of the instrument rather than the back was recognized, though unusual. Historical disputes over whether a signature constituted a valid indorsement or some other form of obligation (e.g., a maker's signature) can turn on placement and accompanying words. Fifth, the allonge — an attached slip used when back space is exhausted — appears in Bouvier and Illinois case authority cited there; researchers examining long chains of commercial paper transfers will encounter allonge indorsements and should understand their legal equivalence.
The two encyclopedia entries provide the essential surrounding framework: contracts_152 covers the mechanics of negotiation and transfer under UCC Articles 3-201 through 3-206, and contracts_155 addresses the liability structure across all instrument parties. Indorsement doctrine cannot be fully understood without both.
Historical Dictionary Support
The five shelf sources are in strong agreement on the core definition. Black's (both editions) and Bouvier frame indorsement as the act of writing one's name on the back of a negotiable instrument by which property is assigned to another, with both editions emphasizing that qualifying words may or may not accompany the signature. Bouvier adds the allonge rule — indorsement on an attached slip when the original lacks space — citing Illinois authority directly. Anderson's Dictionary of Law contributes the most nuanced treatment, acknowledging that placement on the face is technically possible and flagging that "without recourse" qualified indorsements were contested in some pleading contexts. Rapalje & Lawrence takes a case-law citation approach rather than a definitional one, pointing to blank indorsement doctrine and innocent indorsee recovery — useful for tracing early common law development of the bona fide purchaser protection but less useful as a standalone definition.
Webster's 1913 aligns closely with all five legal sources on the core act and its written product, citing Story, Byles, and Burrill as authorities — evidence that by 1913, the legal and general-language definitions had not yet significantly diverged. The historical sources collectively say nothing about the modern general-usage expansion of "endorsement" to mean public support or approval, confirming that this meaning is entirely post-commercial-law-era and irrelevant to legal research in the corpus.
Jurisdictional Note
Modern U.S. indorsement law is governed by UCC Article 3, adopted with variations across all states. The spelling "endorsement" is used throughout the UCC. Pre-UCC American law and English common law used "indorsement" and developed the blank/special/qualified/restrictive framework that the UCC largely codified. Researchers working in English or pre-UCC American materials will find the doctrine substantively similar but terminologically and procedurally distinct.