Definition
A tacit mortgage is a mortgage created by operation of law rather than by agreement of the parties. No contract, deed, or written stipulation between creditor and debtor is required; the law itself imposes the mortgage lien on the debtor's property in favor of certain creditors as a matter of legal policy. The term is specific to Louisiana civil law and is synonymous with legal mortgage in that jurisdiction.
Where a conventional mortgage arises from a voluntary agreement, a tacit mortgage arises automatically whenever the law determines that a particular class of creditor deserves security — without any act by either party to create it.
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Common Confusion
TACIT MORTGAGE vs. CONVENTIONAL MORTGAGE vs. JUDICIAL MORTGAGE: These three categories exhaust the basic mortgage types under Louisiana civil law, and researchers occasionally conflate them. A conventional mortgage is created by contract. A judicial mortgage arises from the recordation of a court judgment. A tacit (legal) mortgage arises from neither — it is imposed by the legislature through the Civil Code. The distinction matters for priority analysis, notice requirements, and the rules governing what must be recorded to be enforceable against third parties.
TACIT MORTGAGE vs. LIEN: In common law systems, the concept most analogous to a tacit mortgage is the statutory lien — an encumbrance imposed by law on property to secure an obligation. Researchers trained in common law systems should resist importing lien doctrine directly into tacit mortgage analysis; the Louisiana civil law framework governs the creation, rank, and extinction of tacit mortgages on its own terms.
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Why It Matters in Research
Louisiana is the only U.S. jurisdiction where tacit mortgage appears as a live legal concept, and its civil law heritage means the doctrine tracks French and Spanish sources rather than Anglo-American precedent. Researchers working in Louisiana property records, succession matters, or creditor-debtor disputes must understand that certain encumbrances on real property may exist and affect title without any recorded instrument — because the law creates them automatically.
This has significant implications for title searches. Unlike conventional or judicial mortgages, which typically require recordation in the mortgage records of the parish to be effective against third parties, the rules governing tacit mortgages and their enforceability against bona fide purchasers have shifted over time in Louisiana. Louisiana substantially reformed its mortgage law in the late twentieth century, and modern Louisiana law has curtailed or restructured many of the historical tacit mortgage categories that once existed under the Civil Code. Researchers using nineteenth or early twentieth century Louisiana sources — including earlier editions of Black's or period Louisiana treatises — will encounter a broader and more robust doctrine than what survives in current law.
The Black's definition references Civil Code of Louisiana article 3311, which belongs to the pre-revision numbering scheme. That article no longer exists in its original form. Researchers must account for this when tracing citations across historical and modern Louisiana Civil Code editions.
For priority questions — who gets paid first when multiple creditors have claims against the same property — tacit mortgages historically occupied defined ranks under Louisiana law. Understanding whether a tacit mortgage outranked a conventional mortgage on the same property requires careful attention to the period-specific Civil Code provisions and any transitional rules in effect at the time of the transaction.
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Historical Dictionary Support
Black's Law Dictionary defines tacit mortgage exclusively within the Louisiana context, quoting Civil Code of Louisiana article 3311 directly: the law, in certain cases, gives the creditor a mortgage on the debtor's property without any stipulation by the parties, and this is called both legal mortgage and tacit mortgage — tacit because no agreement is needed to establish it.
Black's framing is accurate for the historical period it reflects but offers no guidance on which specific creditor classes the law favored, the extent to which tacit mortgages survived the major Louisiana Civil Code revisions, or how modern Louisiana courts have treated historical tacit mortgage claims in litigation over title or priority. The entry is a starting point, not a sufficient research endpoint.
The civilian intellectual tradition behind the term is French. The concept descends from the hypothèque légale of French law, itself rooted in Roman law principles allowing the law to impose security interests for certain privileged creditors — including, historically, tutors' wards, wives with claims against their husbands' property for dowry restitution, and the state for tax obligations. Louisiana absorbed this framework through its Spanish and French colonial periods. Researchers tracing tacit mortgage doctrine into Louisiana's nineteenth century jurisprudence will need familiarity with the French and Spanish civilian sources that informed the original Civil Code drafters.
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Jurisdictional Note
Tacit mortgage is a Louisiana-specific term with no operational counterpart in the common law states. Researchers working in any other U.S. jurisdiction should treat the concept as inapplicable and look instead to statutory lien law for analogous protections. Within Louisiana, the current Civil Code governs; citations to pre-revision article numbers (including article 3311 as quoted in Black's) require cross-referencing against the post-revision numbering.
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Encyclopedia Cross-Reference
The Law Mind Property Law Encyclopedia — Mortgages: Priority of Mortgages and Subordination Agreements
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