Definition
An action originating in Roman civil law, available to a buyer who purchased goods at a price exceeding their true value due to a defect in the thing sold. Rather than rescinding the sale entirely, the buyer used this action to recover the difference between the price paid and the actual value of the defective goods — that is, to reduce the purchase price proportionally to the deficiency. The remedy was partial and compensatory: the sale stood, but the seller was required to refund the amount by which the thing fell short in value.
The actio quanti minoris is contrasted with the actio redhibitoria, which sought full rescission of the sale and return of the purchase price. Together, these two actions formed the buyer's primary remedies under the Roman aedilitian edicts for latent defects in sold goods.
Why It Matters in Research
Researchers encountering this term in historical sources — particularly in treatises on contract, sale, or civil law — should understand that it refers to a specific Roman law remedy, not a general damages principle. The term appears most frequently in discussions of the civil law tradition and in American and Scottish equity scholarship that drew on continental sources.
The action is historically significant because it anticipates the modern doctrine of warranty of quality and price reduction remedies found in civilian-influenced systems. Researchers working in Louisiana law, Quebec law, or other mixed jurisdictions will find this action directly relevant, as civilian sale law in those systems preserved analogous buyer remedies that track the Roman model far more closely than common law warranty doctrine does.
In common law jurisdictions, the actio quanti minoris has no direct procedural counterpart, but its conceptual logic — price reduction rather than rescission — surfaces in modern consumer protection statutes and in the CISG's price reduction remedy (Article 50). When reading 18th- and 19th-century equity treatises, particularly Scottish sources such as Kames, the action is invoked to explain equitable price adjustment principles that English common law struggled to accommodate through its own forms of action.
A key research trap: do not conflate this action with a general damages claim for breach of warranty. The actio quanti minoris was a specific civil law procedural vehicle tied to the aedilitian edicts governing market sales. Modern civilian codifications have absorbed and transformed this remedy; the Roman label may not appear in modern codes even where the functional equivalent survives.
Historical Dictionary Support
Burrill defines the action cleanly and accurately, citing Pothier's Contract of Sale and Kames' Equity — both standard 18th-century authorities that transmitted Roman sale law into Anglo-American legal scholarship. Burrill's formulation captures the essential feature: the buyer recovers not the whole price but only "so much of the price as the thing was of less value," preserving the transaction while correcting its economic distortion.
Burrill does not discuss the procedural origin of the action in the aedilitian edict, nor does he distinguish it from the actio redhibitoria beyond implication. Researchers relying solely on Burrill will understand the remedy's function but may miss its place within the broader Roman law framework of sale remedies. Pothier's treatise, cited by Burrill, remains the more complete treatment for researchers who need to trace the action's doctrinal lineage into civilian codifications.
Jurisdictional Note
The actio quanti minoris, or its functional equivalent, survives explicitly in Louisiana's Civil Code governing sale and redhibition. In common law jurisdictions, the concept has no formal procedural equivalent, though analogous outcomes may be reached through breach of warranty damages or statutory price reduction remedies under modern commercial codes.