Definition
Obligation solidaire is a term of French civil law denoting a joint and several obligation — one in which multiple parties are bound together such that each is individually liable for the whole of the debt or performance, and the creditor may demand full satisfaction from any one obligor without first pursuing the others. The term encompasses both the liability side (passive solidarity, where multiple debtors each owe the whole) and the rights side (active solidarity, where multiple creditors each may demand the whole). It is the civil law counterpart to the common law concept of joint and several liability.
In civilian systems descended from the French Civil Code — including Louisiana, Quebec, and other mixed jurisdictions — solidarity among obligors is not presumed and must generally be expressly stipulated or arise by operation of law. This distinguishes the civil law approach from many common law jurisdictions, where joint and several liability may arise by default from a joint undertaking.
Common Confusion
Obligation solidaire is often loosely equated with "joint and several liability" in English-language legal writing, and the equivalence is broadly accurate. However, the French concept is more architecturally complete: it explicitly recognizes active solidarity (among creditors) as a parallel institution alongside passive solidarity (among debtors). Common law doctrine focuses almost entirely on joint and several liability among debtors; the creditor-side concept has no robust common law equivalent and is rarely discussed in English-language sources. Researchers should not assume that English common law authority on "joint and several" maps cleanly onto all aspects of obligation solidaire.
Recognized Forms
/SUBTYPES
Solidarité passive: Solidarity among debtors. Each co-debtor owes the entire obligation to the creditor, who may pursue any one for the full amount. The most frequently litigated form and the one most closely analogous to common law joint and several liability.
Solidarité active: Solidarity among creditors. Each co-creditor is entitled to demand full performance from the debtor. Payment to any one co-creditor discharges the debt as to all. Less common in practice and largely absent from common law systems.
Why It Matters in Research
Researchers working in Louisiana law, Quebec law, or the private international law of obligations will encounter this term with significant doctrinal weight. Louisiana's Civil Code articles on solidarity (Articles 1790–1806 of the Louisiana Civil Code) directly implement the civilian concept, and Louisiana courts have treated solidarity as a distinct doctrine with its own rules — not merely a French label for common law joint and several liability. Researchers should not import common law presumptions about joint obligations into Louisiana materials without checking whether the civil law rules on solidarity apply instead.
Historical sources, including both Black's and Rapalje & Lawrence, treat obligation solidaire as a brief cross-reference to "joint and several," which undersells the active solidarity dimension and the civilian rule against presuming solidarity. Researchers relying solely on those entries may miss cases and doctrinal arguments turning on whether solidarity was expressly stipulated or arose from statute.
In mixed jurisdiction research, pay attention to whether a source is applying civilian solidarity rules (requiring express stipulation or statutory basis) or common law joint and several rules (which may arise by implication). The difference can determine whether a creditor can pursue one obligor for the whole, and what contribution rights exist among co-obligors after payment.
The cross-references appended to the Rapalje & Lawrence entry — citing Massachusetts and South Carolina reporters on "obligations for money due" and "bonds of other obligations" — are unrelated to obligation solidaire proper and appear to be a typographical or compositional artifact of that dictionary's formatting. Researchers should disregard them as guidance on this term.
Historical Dictionary Support
Both Black's and Rapalje & Lawrence define obligation solidaire minimally, treating it as a French law synonym for joint and several liability. Black's provides only a one-line equivalence. Rapalje & Lawrence adds the important observation that the term applies to joint and several rights of creditors as well as joint and several liability of debtors — a valuable note that correctly signals the active solidarity dimension, though neither source develops it.
Neither historical dictionary addresses the civilian presumption against solidarity, the distinction between conventional and legal solidarity, or the contribution mechanics among co-obligors following payment. For those dimensions, researchers must go directly to the French Civil Code, the Louisiana Civil Code, or civilian treatises such as Planiol's Traité élémentaire de droit civil, which treats solidarity as a central institution of the law of obligations with considerably more nuance than the English-language dictionaries reflect.
Jurisdictional Note
Louisiana is the primary common law country jurisdiction where obligation solidaire has direct doctrinal force as a civilian concept. Quebec follows closely parallel rules under its Civil Code. Researchers working in other U.S. states or English common law jurisdictions will encounter the term mainly in private international law contexts or in the interpretation of contracts governed by French or Louisiana law.
Encyclopedia Cross-Reference
The Law Mind Encyclopedia does not contain a dedicated entry on civilian solidarity or obligation solidaire. For related structural concepts involving legal duties shared among multiple parties, researchers may find background context in: Employee Handbooks as Contractual Obligations (The Law Mind Employment & Labor Law Encyclopedia); Government Contractor Employment Obligations (The Law Mind Employment & Labor Law Encyclopedia). Neither entry addresses civilian solidarity directly.