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Providing the CPF during purchases has become a habit in Brazil, but the practice requires attention regarding benefits, privacy, and consumer rights.
Providing the CPF when checking out at the supermarket has become a common scene in Brazil. In 2026, the practice remains associated with discounts, points programs, personalized offers, and issuing a receipt linked to the consumer.
The simple act of stating the document number at the checkout also involves the use of personal data. For this reason, data protection specialists emphasize that the consumer needs to understand when it is worth providing the CPF and when they can refuse.
The General Data Protection Law, known as LGPD, has been in effect since 2020 and establishes rules for the collection, storage, and use of personal information. Thus, supermarkets and other companies must explain how the data is handled.
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Why supermarkets ask for CPF at the time of purchase
The request for the CPF usually has a direct purpose: to identify the consumer within the company’s system. In this way, the supermarket can link that purchase to a specific registration.
The CPF can be used for:
- participation in loyalty programs;
- release of exclusive discounts;
- issuance of linked receipts;
- accumulation of points;
- sending personalized offers.
The consumer can receive advantages by providing the document. However, these advantages need to be clear and presented transparently.
Benefits may include tax credits, discounts, and personalized offers
In many states, providing the CPF on the receipt can generate credits or participation in tax programs. Additionally, retail chains also use the registration to offer discounts on selected products.
In practice, the consumer can track registered purchases, accumulate points, and receive special conditions. Therefore, including the CPF has become frequent in supermarkets, pharmacies, and other establishments.
Still, the benefit needs to justify providing the data. Otherwise, the consumer may choose not to provide the document.
Use of data requires consumers’ attention
Despite the advantages, the CPF can be used to form consumer profiles. In other words, the company can identify habits, preferences, purchase frequency, and types of products acquired.
This information can feed databases and direct advertising. Therefore, the consumer should observe how the company explains the handling of this information.
The privacy policy should inform, in an accessible manner, which data is collected, for what purpose, and for how long it will be stored.
What the LGPD guarantees to those who provide the CPF
The LGPD mandates that companies must handle personal data with security, transparency, and a defined purpose. In this way, the consumer has the right to know how their information is used.
Among the main rights are:
- knowing the purpose of the collection;
- requesting access to stored data;
- requesting correction of information;
- questioning the use of the data;
- understanding how the information is protected.
The consumer can refuse to provide the CPF in regular purchases without being prevented from completing the purchase. This refusal should not block access to the product or payment.
When it is worth providing the CPF at the supermarket
Providing the CPF can be advantageous when the benefit is clear. This occurs, for example, when there is a real discount, participation in a reliable program, or a tax credit known to the consumer.
It is also worth considering the practice when the company presents a transparent privacy policy. In this case, the customer can better understand the use of the information.
On the other hand, if there is doubt about the handling of the data, refusal may be a safer choice.
How to protect your data when shopping
Some simple actions help the consumer maintain more control over their information. Before providing the CPF, it is important to check if there is a privacy policy available.
Additionally, it is worth avoiding providing the document when there is no clear need. It is also advisable to monitor registrations, points programs, and movements linked to the CPF.
Thus, the consumer can enjoy possible benefits without compromising security. In 2026, providing the CPF at the supermarket can continue to be useful, as long as the decision is conscious, transparent, and aligned with the rights provided in the LGPD.
