Understanding hidden defects in contracts

December 11, 2025
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Who has never bought an electronic device that, after a few days of use, starts to malfunction? You go into despair because you financed the purchase in many installments and when you look for the store that sold it, you are told that the warranty offered is only 7 days. After this period, the 90-day legal warranty provided for in the Brazilian Consumer Protection Code for non-durable goods comes into effect. However, the defect only appeared after 180 days and, when purchasing the product, you did not “extend” the warranty to 1 year. In fact, despite being a common practice in the traditional or virtual commerce, the extended warranty tends to be very expensive and causes a lot of headaches for the user when in need to use it. Now what?

The fact is that there is no other alternative than to seek technical assistance and be prepared to pay for the repair out of your own pocket. However, when opening the equipment, the technician finds that the equipment had already undergone repairs, therefore being a refurbished equipment that had been sold as if it were a new product.

Here, we are faced with an example of a hidden defect!!! Where at no time was this condition presented to you by the seller.

Definition of Hidden Defect

Although the term “hidden defect” may seem like a dirty word to the average citizen who is not a legal scholar, it means nothing more than concealed defects in a good or product that (i) make it unfit for its intended use or (ii) significantly reduce its value. These defects are not apparent at the time of purchase, being pre-existing in the good or product and, if the buyer had known of their existence, he probably would not have purchased the product or would have paid a lower price.

Therefore, it is clear that the buyer was not aware of the situation described above. On the other hand, if such condition had been exposed in a transparent manner by the seller and if the seller had been able to prove the condition of the product as a refurbished good, such condition would cease to be a hidden defect, that is, a concealed defect, as the buyer would be aware of such condition and possibly purchasing the product at a discount on the average market price, due to such condition.

Legal Grounds for Hidden Defect

In Brazilian law, hidden defects are regulated in the Brazilian Civil Code, specifically in articles 441 to 446:

                                                                                                                                                                                                                                                               
               

                   Article                

           
               

                   Description                

           
               

                   441                

           
               

                   The thing received through a commutative contract may be                    rejected due    to hidden defects or flaws, which make it                    unsuitable for its intended use or    reduce its value.                

           
               

                   442                

           
               

                   Instead of rejecting the item, by returning the contract                    (article    441), the buyer may claim a price reduction.                

           
               

                   443                

           
               

                   If the seller knew of the defect or flaw in the item, he                    will return    what he received, with losses and damages; if                    the seller was not aware of it,    he will only refund the                    amount received, plus the contract expenses.                

           
               

                   444                

           
               

                   The liability of the seller subsists even if the thing                    perishes in the    possession of the buyer, if it perishes                    due to a hidden defect, already    existing at the time of                    transfer.                

           
               

                   445                

           
               

                   The buyer loses the right to obtain restitution or a                    reduction in the    price within thirty days if the item is                    movable property, and one year if it    is real estate,                    counted from the effective delivery; if it was already in                    possession, the term is counted from the sale, reduced by                    half.                

           

Additionally, although the Brazilian Consumer Protection Code is not explicit regarding hidden defects, the provisions below may assist in its grounding, if the object of the dispute arises from a consumer transaction:

                                                                                                                                                                                                                       
               

                   Article                

           
               

                   Description                

           
               

                   18                

           
               

                   Suppliers of durable or non-durable consumer goods are                    jointly and    severally liable for defects in quality or                    quantity that make them unsuitable    or inadequate for the                    intended use or reduce their value, as well as for    those                    resulting from disparity with the indications on the                    container,    packaging, labeling, or advertising message,                    respecting variations resulting    from their nature, and                    the consumer may demand the replacement of the    defective                    parts.                

           
               

                   20                

           
               

                   The service provider is liable for quality defects that make                    the    service unfit for consumption or reduce its value, as                    well as for those    arising from disparity with the                    information contained in the offer or    advertising                    message, and the consumer may demand, alternatively and at                    their    choice:                

           
               

                   23                

           
               

                   The supplier's ignorance of quality defects due to the                    inadequacy of    products and services does not exempt him                    from liability.                

           
               

                   26                

           
               

                   The right to complain about apparent or easily detectable                    defects    expires in:
                   I – thirty days, in the case of provision of services and                    non-durable    products;
                   II – ninety days, in the case of provision of services and                    durable products.                

           

Deadline for Hidden Defects Complaints

This period varies in Brazilian law, depending on whether the good or product in question is the result of a consumer transaction or not.

If the good or product is the result of a consumer transaction, the rules arising from the Brazilian Consumer Protection Code apply. In this case, the same peremptive periods provided for apparent defect complaints will apply, that is, 30 days for non-durable goods and 90 days for durable goods, with such periods being counted from the day on which the buyer becomes aware of the hidden defect.

If the good or product is not the result of a consumer transaction, the terms of the Brazilian Civil Code prevail, that is, for movable property, the term will be 30 days and for real estate, the term will be 1 year, from the moment of effective delivery of the good. However, the same device establishes that if the defect can only be discovered later, the period will be counted from the moment the buyer becomes aware of the defect, up to a maximum period of 180 days for movable property; and 1 year for real estate.

Seller's Liability for Hidden Defects

Again, there is a distinction in the seller's liability depending on whether we are referring to a good or product arising from a consumer transaction or not.

If the reference is to a good or product resulting from a consumer transaction, the Brazilian Consumer Protection Code makes it clear that the seller's (supplier's) ignorance of quality defects due to inadequacy of products and services does not exempt him from liability. Therefore, the buyer can return the goods or agree to the return of part of the amount paid.

If the reference is to a good or product not arising from a consumer transaction, the Brazilian Civil Code distinguishes the seller's liability according to whether or not he is aware of the hidden defect, that is, if the seller was aware of the defect or flaw in the item, he must return to the buyer what he received, with losses and damages. However, if he was not aware, the seller must only refund the amount received, plus the contract expenses. In this case, the buyer may also request a refund of part of the paid amount and keep the good or product.

Pre-existence of Hidden Defect

An aspect of significant relevance for those who will apply or claim something due to a hidden defect is the need for its pre-existence at the time of sale of the good or product, even if the defect only becomes apparent later.

The predominant court precedents in Brazil draw attention to this requirement, as per the summary below:

                                   
               

                                           Court of Appeals of    DF – XXXXX20218070014 1725503                                        
                   Case Law • Decision
                   
                   CIVIL LAW. CIVIL PROCEDURE. CONSUMER-PROTECTION LAW. CIVIL                    APPEAL. KNOWLEDGE    ACTION. PURCHASE OF USED VEHICLE.                    HIDDEN    DEFECT(CONCEALED                                            DEFECT                                        ).    REQUEST FOR CONTRACT TERMINATION WITH COMPENSATION FOR                    GENERAL AND MATERIAL    DAMAGES.
                   PRE-EXISTENCE OF DEFECT NOT    PROVEN. THE                    SENTENCE IS MAINTAINED. 1. A hidden defect                    is a concealed defect that makes the acquired item                    unsuitable for its intended purpose or that reduces its                    value. 2. Recognition    of a hidden defect                    depends on    unequivocal proof of its                                            existence                                        at a time prior to the transfer of the property to the                    buyer. 3. Failure to    prove the fact constituting the                    alleged right will result in the dismissal of    claims for                    contract termination and compensation for material and                    general    damages. 4. Appeal acknowledged and not granted.                    Unanimous.                

           
                                   
               

                                           DJGO August 09, 2024    – Page                                                                1761 – Section I    –  Justice Gazette of the State of                        Goiás                                        
                   Official Gazette • August 08, 2024 • Official Gazette of the                    State of Goiás
                   In order to establish the                                            existence of    a hidden defect                                        , the following requirements must be met: a) the thing                    must have been received through a commutative contract (e.g.,                    a    purchase and sale, transfer… As is known, a                                            hidden defect                                        consists of a concealed defect in the thing, by    virtue of                    which it becomes unsuitable for the intended use or has its                    value    reduced… In the present case, the                                            pre                                        -existence    of the defect at the end of the warranty                    period remained undisputed, as well    as that the vehicle                    presented a problem more than once…                

           
                                   
               

                                           DJRO June 30, 2021 –    Page                                                                2035 –  Justice Gazette of the State of Rondônia                                        
                   Official Gazette • June 29, 2021 • Official Gazette of the                    State of Rondônia
                   As a rule, the party alleging the                                            existence    of a hidden defect                                        in a vehicle engine must produce proof that the defect                    pre-exists the sale of the automobile…                                            Hidden    defects                                        . Not proven. Natural wear and tear of parts. General                    damages.    Nonexistent...                

           
                                   
               

                                           DJSE April 14, 2023 –    Page                                                                184 –  Justice Gazette of the State of Sergipe                                        
                   Official Gazette • April 13, 2023 • Official Gazette of the                    State of Sergipe
                   HIDDEN DEFECT NOT FOUND, THE    BURDEN OF                    PROOF IS REGARDING THE EXISTENCE OF THE                    MENTIONED DEFECT WHEN    ACQUIRING THE                    GOOD, IN ACCORDANCE WITH ARTICLE 333, I, OF THE BRAZILIAN                    CODE    OF CIVIL PROCEDURE
                   NEED TO REPLACE SOME PARTS, DUE    TO…                    MAINTENANCE OF THE IMPOSED JUDGMENT. ALLEGATION OF                    CONTRADICTION IN THE    JUDGMENT REGARDING THE ADOPTED                    JUDGMENT PREMISE, SINCE IT WAS DEMONSTRATED    THAT THE                    HIDDEN DEFECT AT HAND    REQUIRES PRIOR                    TECHNICAL EXAMINATION OR… CARLOS ANISIO SANTOS DA ROSA –                    BRAZILIAN BAR ASSOCIATION:
                   8992/SE HEADNOTE: MOTION FOR CLARIFICATION – CIVIL APPEAL                    
                   ACTION FOR REDUCTION OF THE PRICE WITH REQUEST FOR                    COMPENSATION FOR GENERAL    DAMAGES
                   PURCHASE AND SALE OF USED VEHICLE –ALLEGATION OF                    CONCEALED HIDDEN DEFECT…                

           

Therefore, the pre-existence of the defect is imperative to characterize the right to reject or discount the price of the good in favor of the buyer, since the defect could be due to natural wear and tear or some other condition for which the seller would not be responsible, in accordance with the law.

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