Definition
The Lex Cornelia de Sponsu was a Roman statute restricting the liability of a sponsor or fidepromissor — a personal surety — who bound himself for another's debt. The law operated on two levels. First, it prohibited a person from pledging surety for the same debtor to the same creditor more than once within the same year for a cumulative amount exceeding a fixed ceiling. Second, even where a surety purported to bind himself for a larger sum, his enforceable liability was capped at the statutory maximum, traditionally stated as twenty thousand sestertii. Any excess undertaking was not void outright but was simply unenforceable beyond the limit.
The phrase "money lent" — the category of obligation to which the cap applied — was construed broadly. It encompassed not only funds directly advanced as a loan but also equivalent credit transactions, reflecting the Roman tendency to read suretyship limits functionally rather than formally.
The law belongs to the category of Roman leges on suretyship that collectively shaped how sponsio, fidepromissio, and fideiussio operated in classical Roman private law. The Lex Cornelia de Sponsu is distinct from the later Lex Furia de Sponsu, which introduced automatic extinction of a surety's liability after two years, and from the Epistula Hadriani, which created the beneficium divisionis allowing co-sureties to divide liability among themselves.
Common Confusion
LEX CORNELIA DE SPONSU vs. LEX FURIA DE SPONSU: These are separate statutes with different effects. The Lex Furia extinguished a surety's obligation automatically two years after the debt became due and divided liability equally among co-sureties; the Lex Cornelia capped the amount for which a surety could be bound within a given year to the same creditor for the same debtor. The two laws operated cumulatively in classical Roman law but addressed distinct problems. Historical dictionaries, including Bouvier's, sometimes list them in close proximity without clearly differentiating their scope.
Why It Matters in Research
Researchers encounter this term almost exclusively in two contexts: Roman law surveys and historical treatments of suretyship and guarantee law in civilian and mixed jurisdictions.
The most common research trap is conflation. Roman law produced several overlapping statutes on suretyship — the Lex Publilia, the Lex Furia de Sponsu, the Lex Appuleia, the Lex Cicereia, and the Lex Cornelia de Sponsu — each addressing a different aspect of surety liability. Bouvier's entry, like most historical dictionary treatments, names the Lex Cornelia de Sponsu in isolation without mapping it against the others. Researchers tracing the development of the beneficium excussionis (the surety's right to require the creditor to exhaust the principal debtor first) or the beneficium divisionis will need to consult Gaius and Justinian's Institutes directly, as none of these benefits trace to the Lex Cornelia specifically.
The citation to Inst. 2.20 in Bouvier's entry refers to Justinian's Institutes, Book 2, Title 20 — the primary ancient source on this statute. Researchers should be aware that Justinian's compilation postdates the law's original enactment by centuries and reflects the law as filtered through the classical and post-classical periods. The Institutes remain the most accessible primary source, and the Digest offers supplementary treatment.
For researchers in civilian systems tracing the historical roots of guarantee and suretyship doctrine, the Lex Cornelia de Sponsu represents an early instance of statutory limitation on personal liability — a conceptual ancestor to modern legislative caps and good faith obligations in guarantee contracts.
The term will not appear in common law dictionaries or American legal encyclopedias. Its presence in Bouvier's reflects the edition's Roman law apparatus, included to support practitioners and scholars working with civilian sources or comparative questions.
Historical Dictionary Support
Bouvier's Law Dictionary provides the principal English-language treatment. The entry identifies the statute's dual operation — the prohibition on multiple surety undertakings within a year exceeding the ceiling, and the cap on enforceable liability regardless of the amount actually pledged — and notes the broad construction of "money lent." The Bouvier entry is brief and primarily descriptive, offering no analysis of the statute's relationship to other leges on suretyship or its historical dating.
Bouvier cites Justinian's Institutes 2.20 as authority, which is appropriate. Historical dictionaries generally do not distinguish between the Lex Cornelia de Sponsu and the Lex Furia de Sponsu with any precision, and researchers should not rely on dictionary treatments alone to map the Roman suretyship regime. Primary sources — Gaius's Institutes (Books 3.115–127) and Justinian's Institutes (Book 3.20) — provide more complete treatment, including how the several statutes interacted and which applied to which classes of sureties.
Jurisdictional Note
This term has no operative legal meaning in any modern common law jurisdiction. In civilian jurisdictions with Roman law roots — including Scotland, South Africa, and Louisiana — the historical suretyship statutes inform academic and comparative analysis but have been superseded by modern codes. Research applications are historical and comparative only.