Definition
A nudum pactum (Latin: "naked pact") is an agreement or promise made without consideration — that is, without any legally recognized exchange or inducement moving from the promisee to the promisor. Because consideration is a foundational requirement for a binding contract at common law, a nudum pactum is generally unenforceable: the promisee receives nothing more than the bare words of a promise, and the law will not compel performance of it.
The concept has distinct meanings depending on whether the analysis is conducted under common law or civil law:
1. At common law: Any promise unsupported by consideration. The promisor has made an agreement, but because the promisee has given nothing in return — no act, forbearance, or counter-promise — no binding obligation arises. The agreement is "naked" in the sense that it lacks the legal clothing necessary to make it enforceable.
2. In Roman and civil law: A pact that falls outside the recognized categories of enforceable agreements (nominate contracts, innominate contracts, or pacts given special standing by the praetor). Civil law systems recognized certain pacts as actionable even without a formal contract structure; a nudum pactum was one that failed to qualify for any of those exceptions and therefore produced only a natural obligation, not a civil right of action.
Common Language
Modern common usage (Wiktionary): A promise that is not legally enforceable due to lack of consideration.
Historical common usage (Webster's 1913): A bare, naked contract, without any consideration.
Editorial note: Both definitions capture the core concept adequately, but neither distinguishes between the common law and civil law senses. In common law discourse, the term is almost always a shorthand for "no consideration, no contract." In civil law scholarship and historical texts, it carries a more technical meaning tied to the taxonomy of Roman contract law, where the problem is not merely the absence of exchange but the absence of any juridical ground for enforcement. Researchers conflating the two senses may misread civil law sources.
Common Confusion
Nudum pactum is sometimes used loosely as a synonym for "void contract" or "unenforceable agreement" generally. The term is technically narrower: it identifies one specific defect — absence of consideration — rather than all possible grounds for unenforceability. A contract may be unenforceable for reasons having nothing to do with consideration (illegality, incapacity, failure of a condition precedent) without being a nudum pactum. The distinction matters when reading historical pleading records, where the characterization of an agreement as nudum pactum was a specific defense, not a general one.
Why It Matters in Research
Structural pattern: This term follows the historical evolution pattern. The phrase appears continuously from Roman law through early modern common law into 19th-century American and English cases, but its practical weight has shifted dramatically. Understanding that shift is essential to reading sources accurately.
In historical sources (roughly pre-1850), nudum pactum appears frequently in contract pleadings, equity arguments, and treatise discussions as the standard Latin label for a promise without consideration. Researchers reading early chancery records, colonial court documents, or 18th-century American decisions will encounter it as a live pleading term, not merely scholarly Latin.
By the late 19th century, the Latin phrase was increasingly replaced in American practice by plain-English formulations: "failure of consideration," "want of consideration," or simply "no consideration." The Latin persists longest in academic and treatise writing. A researcher tracking the doctrine rather than the phrase must shift vocabulary when moving across periods.
Jurisdictional drift is a real trap. In Louisiana and Quebec — civil law jurisdictions — nudum pactum appears in sources that are not analyzing consideration doctrine at all, but rather the Roman taxonomy of contracts. A Louisiana case using the phrase may be making a completely different argument than a Massachusetts case using the same phrase in the same year.
The corpus connection to CONSIDERATION is the most important navigational link. Any research thread involving nudum pactum will necessarily engage the historical development of consideration doctrine, its moral obligation exceptions, and the contested question of whether past consideration or preexisting duties defeat the consideration requirement. Tracing nudum pactum through the corpus is effectively a way to trace the outer boundaries of enforceable promises across time.
Historical Dictionary Support
The historical dictionaries agree on the core: a pact without consideration is naked and unenforceable. But they differ in emphasis and depth.
Black's provides the most useful analytical statement, quoting the maxim: "Nudum pactum est ubi nulla subest causa praeter conventionem; sed ubi subest causa, fit obligatio, et parit actionem" — a naked contract exists where there is no cause except the agreement itself; but where cause exists, it becomes an obligation and gives rise to an action. The reference to Plowden grounds this in early common law authority and signals that the maxim was already naturalized into English law by the 16th century.
Burrill goes furthest in preserving the civil law texture, citing Heineccius and Calvinus, and distinguishing the nudum pactum as a pact that lacks both special name and cause — reflecting the Roman distinction between nominate contracts (which had recognized names and legal force) and bare agreements that did not. Burrill's entry is the most useful for researchers working in civil law materials or tracing the Roman foundations of the doctrine.
Bouvier redirects to CONSIDERATION without independent elaboration — a signal that by the time of his dictionary, the concept had been so thoroughly absorbed into consideration doctrine that separate treatment seemed redundant.
Rapalje & Lawrence redirect to NUDE CONTRACT, suggesting that by the late 19th century, the Anglicized form was preferred in American usage and the Latin was retreating to historical and academic contexts.
What the historical dictionaries collectively miss: none of them addresses the natural obligation that civil law attached to a nudum pactum. In Roman and civil law theory, a naked pact was not simply void — it created a natural obligation that could serve as a defense (solutio retenta) even if it could not ground an action. This distinction between civil and natural obligation is invisible in the common law dictionaries and must be recovered from civilian treatises and comparative sources.
Jurisdictional Note
In common law jurisdictions, nudum pactum functions as a consideration-doctrine concept and has largely been replaced by plain-English equivalents in modern practice. In civil law jurisdictions and mixed systems (Louisiana, Quebec, Scotland), the term retains its Roman law meaning, which is structurally different from the common law concept; researchers should not assume equivalence across jurisdictional lines.
Encyclopedia Cross-Reference
See Law Mind Encyclopedia: Consideration — Development of the Doctrine; Roman Contract Law and Its Common Law Reception.