Definition
On demand describes an obligation — most commonly a debt, note, or payment — that is due and enforceable immediately, without the creditor or obligee being required to make a prior request, formal notice, or presentment before pursuing a legal remedy. When a promissory note or other instrument is made payable "on demand," the obligation arises at the moment of execution. The holder may treat the full amount as presently owed and may bring an action to recover it without first making a formal demand on the obligor.
The phrase appears in two related but distinguishable contexts:
1. Promissory notes and instruments: A note payable "on demand" is not merely a note payable at some future time when a request is made. It is a present debt from the date of signing. No demand is a legal prerequisite to suit.
2. General contractual obligations: Obligations described as performable "on demand" require performance at the moment the obligee calls for it, but unlike demand instruments, a triggering request may be required before the obligation matures and a cause of action accrues.
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Common Language
Modern common usage (Wiktionary): "When needed or required."
Historical common usage (Webster's 1913): Not separately defined as a compound phrase; "demand" carried the ordinary sense of a formal request or requirement.
The gap between common and legal meaning is significant. Ordinary usage implies that something done "on demand" happens in response to a request — you ask, then you receive. In the law of negotiable instruments, "on demand" eliminates the request entirely. A demand note does not wait for a call; it is already due. The common-language reading would suggest the holder must ask before the debt exists; the legal meaning is the opposite.
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Common Confusion
Researchers and practitioners sometimes read "on demand" as requiring a formal presentment or notice before a cause of action accrues. For negotiable instruments specifically, this is incorrect: the debt is treated as presently matured, and suit may be brought without prior demand. The confusion is compounded when "on demand" appears in general commercial contracts rather than in instruments, where a triggering demand may in fact be required depending on context and jurisdiction. The distinction between demand instruments (where demand is surplusage) and demand-triggered contractual obligations (where demand starts the clock) is a persistent source of error in both research and drafting.
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Why It Matters in Research
Historical sources are consistent on the core rule for promissory notes: "on demand" means present indebtedness, no demand required before suit. Researchers working with 19th-century commercial law materials will find this rule stated without qualification, and it remains the majority rule under modern negotiable instruments law.
The trap lies in generalizing beyond instruments. When "on demand" appears in commercial contracts, leases, employment agreements, or security arrangements, courts have not always applied the same rule. Whether a demand is merely surplusage or a condition precedent to breach depends on the type of obligation and the applicable body of law. A researcher who finds a 19th-century case on demand notes and applies it to a modern contractual demand clause may be on solid ground or entirely off-track.
Statute of limitations questions require particular care. Because a demand note is a present debt, the limitations period begins to run from the date of execution in many jurisdictions — not from the date a demand is eventually made. This can make demand notes older than they appear in litigation if the holder delayed action.
For corporate law researchers, "demand" appears as a distinct term of art in shareholder derivative litigation, where it refers to the procedural requirement that a shareholder formally demand board action before suing derivatively. That usage is entirely separate from the commercial law meaning and connects to a different body of doctrine.
Corpus connections: The commercial meaning of "on demand" intersects directly with UCC Article 3 (negotiable instruments) and Article 2 (demand for adequate assurances under §2-609). The derivative litigation demand requirement is governed by corporate statutes and court rules, not commercial law.
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Historical Dictionary Support
Black's (1st and 2nd Editions) and Bouvier's converge on an unusually clear and consistent rule: a promissory note payable on demand is a present debt, payable without any demand, from the moment of signing. Bouvier goes furthest in spelling out the consequence — "no demand is necessary prior to bringing an action" — and cites English authority alongside American cases. Black's 2nd Edition cites Young v. Weston and the Andress appeal for the American proposition.
What historical sources do not address: the modern elaboration of "on demand" across commercial contracts generally, the UCC framework, or the corporate law demand requirement in derivative suits. Researchers should treat the historical definitions as authoritative for the instrument context and cautious starting points only for broader commercial applications.
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Jurisdictional Note
The rule that a demand note creates a present debt enforceable without prior demand is well-established across U.S. jurisdictions and reflected in UCC Article 3 as adopted in all states. Limitations periods for demand instruments vary: some states begin the period at execution, others at the point a demand is made or a reasonable time passes. This variation directly affects research into stale demand notes.
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Encyclopedia Cross-Reference
Contracts & Commercial Law Encyclopedia: Performance — Demand for Adequate Assurances (UCC §2-609, Restatement §251)
Business Organizations & Corporate Law Encyclopedia: Shareholders — Demand Requirement and Futility in Derivative Litigation
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