Definition
To write one's name on the back of a negotiable instrument — such as a bill of exchange, promissory note, or check — for the purpose of transferring it, guaranteeing payment, or otherwise assuming a legal relationship to the instrument. The act of indorsing creates legal obligations that vary depending on the form the indorsement takes.
Indorse is the historical and technical legal spelling; endorse is the modern variant now standard in both common usage and most contemporary legal instruments. The two spellings are functionally identical in meaning. Older treatises, court opinions, and statutes will use indorse; modern UCC-based materials use endorse.
Common Language
Modern common usage (Wiktionary): Alternative form of endorse.
Historical common usage (Webster's 1913): To write upon the back of a paper or letter, as a direction, heading, memorandum, or address; to write one's name upon the back of a paper for the purpose of transferring it; also, more broadly, to give one's name or support to; to sanction or aid by approval.
The gap here is directional, not definitional. In ordinary modern use, endorse most commonly means to express approval or support — an athlete endorses a product, a newspaper endorses a candidate. In legal usage, indorse is narrower and more precise: it refers specifically to the physical or legal act of signing the back of a negotiable instrument, which carries defined consequences for liability and transfer. The approval sense is present in both, but the commercial-paper sense is almost exclusively legal.
Core Elements
The legal act of indorsing a negotiable instrument typically involves:
1. Signature. The indorser writes their name on the instrument, typically on the back, though placement rules have varied by jurisdiction and era.
2. Transfer or guarantee. The signature operates to negotiate the instrument to another party, to guarantee payment, or both, depending on the form of indorsement.
3. Assumption of secondary liability. An indorser generally becomes secondarily liable — obligated to pay the instrument if the primary obligor (maker or acceptor) defaults and proper presentment and notice of dishonor are given.
4. Intent and capacity. The indorser must have the legal capacity to contract, and the indorsement must be intended to operate as such, not merely as identification or notation.
Recognized Forms
/SUBTYPES
Blank indorsement: The indorser signs only their name, without specifying a transferee. The instrument becomes payable to bearer and is negotiable by delivery alone.
Special indorsement: The indorser specifies the party to whom the instrument is transferred (e.g., "Pay to the order of Jane Smith"). Further negotiation requires Jane Smith's indorsement.
Restrictive indorsement: The indorser limits further negotiation or the use of the instrument (e.g., "For deposit only"). Effect varies under modern UCC treatment.
Qualified indorsement: The indorser adds words such as "without recourse," disclaiming the usual secondary liability. The instrument is still transferred, but the indorser avoids the guarantee of payment.
Conditional indorsement: The indorser attaches a condition to the transfer. Under modern commercial law, conditions in indorsements are largely ignored for purposes of enforceability against subsequent holders.
Why It Matters in Research
The spelling shift from indorse to endorse is the first research trap. Statutes, digests, and court opinions before the mid-twentieth century will index under I, not E. Searching only for endorse in pre-UCC materials will produce incomplete results.
The UCC displaced a patchwork of state negotiable instruments laws beginning in the 1950s and 1960s, and the Uniform Negotiable Instruments Law (NIL) preceded it. The rights and liabilities attached to each indorsement form evolved across these regimes. A researcher working with pre-UCC sources — particularly anything invoking the NIL or older common law rules — should not assume that modern UCC Article 3 definitions apply without verification.
The liability consequences of indorsement are central to commercial litigation research. Whether a party indorsed in blank, specially, or with qualification determines both who can enforce the instrument and what defenses or liabilities attach. Cases turning on indorsement form can look superficially similar but rest on entirely different legal frameworks.
Massachusetts writs present a specific historical quirk: Bouvier notes that Massachusetts writs were indorsed by a person writing their name on the back, making them liable for costs of suit. This is a procedural use of the term unrelated to negotiable instruments and can create confusion when reading older Massachusetts materials.
Scottish law sources compound the difficulty. Rapalje & Lawrence, in portions of its entry, conflates or runs together discussion of indictments and indorsement in a way that reflects printing errors in the corpus. Researchers should treat those entries with care and cross-verify against Bouvier and Black's.
Historical Dictionary Support
The historical dictionaries converge on the core meaning: to write one's name on the back of a negotiable instrument. Bouvier is the most useful, linking indorse directly to indorsement and noting the Massachusetts writ practice as a distinct application. Black's 2nd edition confirms that indorse is a technical term carrying sufficient legal certainty on its own, citing Vermont and Massachusetts authority.
The Rapalje & Lawrence entry in the corpus is problematic — the text as it appears conflates material about Scottish criminal procedure (indictment forms and the lord advocate) with the indorse entry. This appears to be a scanning or compilation artifact in the historical source. Researchers should not rely on the Rapalje & Lawrence indorse entry as printed without independent verification.
Anderson's Dictionary of Law, as it appears in the corpus entry for indorse, similarly contains text that belongs under indictment. Both dictionaries were compiled in an era of dense, unformatted typesetting, and adjacent entries frequently bled into one another in digitization. The substance of indorse as a commercial-paper concept is not meaningfully advanced by either source beyond what Black's and Bouvier provide.
Webster's 1913 is genuinely useful here: it preserves the obsolete sense of indorse meaning to load or burden the back of something (citing Milton's elephants indorsed with towers), which illustrates that the legal technical sense was already firmly established by the time of publication, distinct from the older literary usage.
Jurisdictional Note
Modern indorsement law in the United States is governed by UCC Article 3, adopted with variations in all states. The precise rules on indorsement form, liability, and the effect of restrictive or conditional indorsements differ in detail across state UCC enactments. Researchers working in pre-UCC periods must identify which version of the Uniform Negotiable Instruments Law, if any, was in force in the relevant jurisdiction and year.
Encyclopedia Cross-Reference
Negotiable Instruments — Negotiation, Indorsement, and Transfer (UCC §§ 3-201 through 3-206) (The Law Mind Contracts & Commercial Law Encyclopedia)
Negotiable Instruments — Liability of Parties: Maker, Drawer, Indorser, Acceptor (The Law Mind Contracts & Commercial Law Encyclopedia)