Article 42 of the CDC and Article 940 of the Civil Code

This page is a translation of the original Portuguese text, provided for convenience. It deals with Brazilian law. If there is any discrepancy, the Portuguese version prevails. Read the original in Portuguese

Double refunds can arise under both the CDC (Brazil’s Consumer Protection Code) and the Civil Code, but the two regimes are different. Article 42 requires an undue payment in a consumer relationship and conduct contrary to objective good faith, while Article 940 presupposes a lawsuit and bad faith on the part of the creditor.

Paying a bill that is higher than it should be, a fee you never agreed to, or an installment you had already paid is a common experience. For these situations, the Consumer Protection Code provides a specific remedy that goes beyond simply getting your money back. It is the double recovery of undue payments (repetição do indébito em dobro), set out in Article 42 of the Code.

This article explains in plain language what a double refund is, what its requirements are, why actual payment is central to the rule, and how the Consumer Protection Code provision differs from the similar rule in the Civil Code.

What double recovery of an undue payment means

The starting point is the text of the law. The sole paragraph of Article 42 of the Consumer Protection Code provides that a consumer who is charged an amount that is not owed is entitled to recover it in an amount equal to twice what was overpaid, plus inflation adjustment and legal interest, unless the supplier made a justifiable mistake.

The term repetição do indébito refers to the return of money paid without cause, that is, without a valid basis. The Code goes beyond a simple refund and provides that, in a consumer relationship, the refund is doubled. The purpose is twofold: to make the person who paid whole and to discourage suppliers from making unfounded charges.

It is important to separate two levels. An improper charge is the act of demanding an amount that is not owed. The double refund is the consequence the law attaches to that charge when the consumer actually pays the amount demanded. Without payment, as we will see, the double-refund rule does not apply in the same way.

The requirements of Article 42 of the Consumer Protection Code

Reading the sole paragraph reveals the elements that must be present. The first is a consumer relationship, since Article 42 is part of the consumer protection system. The second is the charge of an amount that is not owed, that is, a demand for a sum that has no support in the contract or in the law.

The third requirement is actual payment. The law speaks of double what the consumer paid in excess, not what was merely charged. For that reason, an improper charge alone, without a corresponding payment, does not give rise to the right to a double refund under this provision, although it may have consequences in other areas of liability.

The fourth element is the absence of a justifiable mistake. A double refund is the rule; a justifiable mistake is the exception the law recognizes. If that exception is established, the doubling is set aside, but the simple refund of the undue amount and any additions that apply in the specific case remain.

Under Article 42, a double refund is the rule when an improper charge has actually been paid, and a justifiable mistake is the exception that must be proven, not the other way around.

With these requirements in mind, we can now look at the element that causes most of the practical disputes on this subject. It is the final clause of the provision, which allows the double amount to be set aside when the supplier’s error is considered justifiable.

Justifiable mistake and the limits of the double refund

Justifiable mistake is the concept that raises the most questions when applying the rule. The law does not define it in detail, so whether it exists depends on the circumstances of each charge. The core idea is an excusable error that falls outside reasonable foreseeability and does not result from the supplier’s own disorganization or carelessness.

Because it requires an analysis of the specific case, the scope of this exception is shaped by case law, including that of Brazil’s Superior Court of Justice (STJ). Whether a charge is classified as an excusable error or an avoidable failure by the supplier varies with the facts, the available documentation, and the legal understanding that applied when the charge was made.

According to the STJ’s Special Court, a double refund does not depend on proof of intent or bad faith and is available when the improper charge violates objective good faith. For private contractual relationships, the rule was limited to undue payments made after March 30, 2021; earlier situations require an analysis of the case law that applied to that period.

For consumers, the practical step is to gather evidence. Keeping bills, contracts, proof of payment, and customer service records helps show both that the charge was improper and that you actually paid it. These items are decisive when the supplier argues that there was only a justifiable mistake and tries to avoid the double refund.

Recovery of undue payments under the Consumer Protection Code and the Civil Code

A similar rule exists outside consumer relationships. Article 940 of the Civil Code provides that anyone who sues for a debt that has already been paid, in whole or in part, without acknowledging the amounts received, must pay the debtor twice what was demanded. This apparent similarity, however, conceals significant differences in the prerequisites.

The penalty under Article 940 of the Civil Code requires a lawsuit and proof of the creditor’s bad faith, according to STJ Topic 622. Article 42 of the CDC, by contrast, requires an undue payment in a consumer relationship and conduct contrary to objective good faith, subject to the time limitation set by the Special Court.

Knowing which rule applies matters because the requirements are not the same. Choosing the right legal basis depends on the nature of the relationship, how the charge was made, and whether there was a payment or a lawsuit. The table below summarizes the main differences between the two provisions.

Constitutional basis and basic consumer rights

Protection against improper charges is not a favor from the market but a consequence of a constitutional choice. Article 5, item XXXII, of the Constitution provides that the State will promote consumer protection, as established by law. In addition, Article 170, item V, lists consumer protection among the principles of the economic order.

This foundation is put into practice through the basic rights in Article 6 of the Code. Among them are adequate and clear information about different products and services, and effective prevention and compensation of property and moral damages. The double refund is one of the tools that make these rights concrete when faced with unfounded charges.

When an improper charge is repeated or comes with embarrassment, the situation may be tied to other unlawful conduct. This is the case with the abusive practices and misleading advertising that the Consumer Protection Code prohibits suppliers from engaging in, a subject that often goes hand in hand with discussions about refunds.

Consumers who have paid an undue amount and want to learn more about how the double refund works will find more detail in the discussion of improper charges and the double refund under Article 42 of the Consumer Protection Code. Defective products, on the other hand, follow the logic of products with defects or flaws and the deadlines for exchange, repair, and refund under the Code, which has its own rules.

Frequently Asked Questions

Does a double refund depend on the consumer having paid the improper charge?

Yes, under Article 42 of the Consumer Protection Code. The law guarantees recovery of twice the amount the consumer overpaid. The key event is actual payment of the undue amount. An improper charge that is never paid does not give rise to a right to a double refund under this provision, although it may have other consequences depending on the circumstances of the case.

What is a justifiable mistake that rules out a double refund?

A justifiable mistake is the exception provided in the final part of the sole paragraph of Article 42. In general terms, it is an excusable error that does not result from the supplier’s carelessness and falls outside reasonable foreseeability. If this exception is established, the double amount is set aside, but the supplier must still refund what was paid, with inflation adjustment and interest. Whether it applies depends on the evidence and the circumstances.

Is the rule in Article 42 the same as Article 940 of the Civil Code?

They are not identical. Both rules provide for a double refund, but they rest on different prerequisites. Article 42 of the Consumer Protection Code deals with charging an amount that is not owed in a consumer relationship and focuses on the amount overpaid. Article 940 of the Civil Code traditionally refers to a lawsuit for a debt that has already been paid. Choosing the right legal basis depends on the nature of the relationship and how the charge was made.

As informações deste artigo são de caráter informativo e não substituem consulta jurídica individualizada. Cada caso possui particularidades que exigem análise específica.