Definition
In civil law, the commodatok (also rendered commodator) is the party who lends a thing gratuitously in a commodatum — that is, the person who delivers an object to another for use, free of charge, with the expectation that the identical thing will be returned. The commodatok is distinguished from the commodatarius, who is the borrower receiving the object on loan. The relationship is strictly gratuitous on the lender's side: no compensation is received for the use of the thing, and the benefit of the transaction runs to the borrower. The commodatok retains ownership throughout and bears certain residual obligations regarding defects in the thing lent.
Common Confusion
COMMODATOK vs. COMMODATARIUS: These two terms represent opposite parties in the same transaction and are frequently misread or transposed in historical sources, particularly where Latin case endings are compressed or anglicized. Commodatok is the lender; commodatarius is the borrower. Confusion is compounded by the fact that the broader transaction — the loan for use itself — is called the commodatum, a word visually similar to both party designations.
COMMODATUM vs. MUTUUM: Commodatum and mutuum are both gratuitous loans in the civil law tradition, but they are categorically distinct. In commodatum, the identical object must be returned, and ownership stays with the lender (the commodatok). In mutuum, fungible goods are lent and equivalent goods of the same kind and quantity — not the same items — are returned, with ownership passing to the borrower upon delivery. A researcher encountering "loan" in a civil law text must determine which transaction is at issue before the party designations carry meaning.
Why It Matters in Research
The term commodatok appears almost exclusively in civil law sources and in common law texts that engage directly with Roman or civilian authority. Researchers working in Anglo-American legal materials will rarely encounter it as a live term of art; when it appears, it signals engagement with the civilian tradition — often in treatises on bailment that situate the common law categories against their Roman counterparts.
The primary research trap is the Latin case-ending variation. Roman legal sources and their early modern commentators render the lender variously as commodator, commodans, and commodatok depending on grammatical context and transliteration conventions. Burrill preserves the form commodatok, but other dictionaries and treatises may index the same party under a different spelling. A corpus search limited to one form will miss cognate entries.
Jurisdictional relevance is sharpest in Louisiana, Quebec, and other mixed or civil law systems where commodatum retains operative legal significance. In those jurisdictions, the commodatok's obligations and rights — particularly regarding extraordinary expenses and defective goods — may be governed by code provisions that track civilian categories directly.
For common law jurisdictions, the practical equivalent of the commodatok is the gratuitous bailor in a loan-for-use bailment. Common law courts and treatise writers frequently translated the civilian category into bailment doctrine without preserving the Roman party designations, so a researcher moving between civilian and common law sources must map these vocabularies deliberately.
Historical Dictionary Support
Burrill's Law Dictionary provides the entry point: commodatok is the lender in a civil law loan for use, defined against its foil, the party to whom the thing is loaned (cui commodata res est), with reference to Justinian's Institutes (4.1.16). The entry is concise and positional — it identifies the party rather than elaborating the duties that attach to that position.
What Burrill's entry does not supply, and what a researcher must seek elsewhere, is the substantive law governing the commodatok's obligations. Classical sources, including the Institutes and the Digest, establish that the commodatok owes a warranty-adjacent duty regarding known defects: if the lender knew the thing was defective and failed to disclose this, liability attaches for harm resulting to the borrower. This obligation travels with the party designation but does not appear in Burrill's brief notice.
Other historical dictionaries in the civilian tradition — Jacob's Law Dictionary and Bouvier's — treat commodatum as the primary entry and address the parties derivatively. This means a corpus researcher should not expect a rich cluster of entries under commodatok itself; the substantive doctrine will be found under commodatum, with party designations scattered through the analysis.
Jurisdictional Note
In Louisiana, the commodatum is codified and the lender's obligations are expressly addressed in the Civil Code. In common law jurisdictions, no equivalent party designation exists as a term of art; the function is absorbed into the gratuitous bailor category, and rights and duties are analyzed under bailment rather than Roman-derived loan categories.
Encyclopedia Cross-Reference
Law Mind Encyclopedia — Commodatum
Law Mind Encyclopedia — Bailment
Law Mind Encyclopedia — Mutuum