Key Takeaways
- MED 2.0 introduces a new in-app fraud dispute feature for Pix, making it easier for consumers and businesses to report suspected fraud and initiate the recovery process.
- New capabilities such as chain blocking and enhanced fund tracing improve the chances of recovering stolen funds, although recovery is not automatic or guaranteed.
- MED remains limited to cases involving fraud, scams, and coercion. Commercial disputes and customer dissatisfaction claims remain outside its scope.
- MED 2.0 is another sign of the continued maturity of the Pix ecosystem, strengthening consumer trust while preserving the speed and efficiency that have driven its widespread adoption.
Table of Contents
As Pix continues to grow, so do the expectations around security and consumer protection.
Today, Brazil’s instant payment system is used by more than 170 million individuals, processing billions of transactions every month. Its success has made Pix an essential part of the country’s payments infrastructure, but it has also increased the importance of providing users with clear and effective tools to report fraud and recover funds when scams occur.
To address this need, the Central Bank of Brazil introduced MED 2.0, an enhancement to Pix’s original Special Return Mechanism (MED). One of the most significant changes is the introduction of a new in-app dispute feature that allows users to report suspected fraudulent transactions directly through their banking application.
The goal is simple: make fraud reporting faster, more accessible, and more efficient. By reducing friction in the dispute process, MED 2.0 helps strengthen trust in the Pix ecosystem while improving the ability of financial institutions to respond to fraud cases.
In this article, we’ll explain what MED 2.0 is, how the new dispute process works, and why these changes further reinforce the security of Brazil’s most popular payment method.
How MED 2.0 improves the Pix fraud dispute process
MED 2.0 introduces three major enhancements to the Pix fraud recovery process: a standardized digital dispute channel, expanded fund tracing capabilities, and longer investigation periods.
Together, these improvements make it easier to report fraud, increase the likelihood of locating transferred funds, and improve the chances of recovering money before it is withdrawn or dispersed across multiple accounts.
1. A faster, fully digital dispute process
Since October 1, 2025, all institutions participating in Pix have been required to provide a digital channel within their banking application for fraud disputes.
While many banks already offered this functionality, MED 2.0 makes it a standardized requirement across the Pix ecosystem.
Under the original MED framework, users typically needed to contact their financial institution through customer service channels to initiate a dispute. This additional step could delay the process, giving fraudsters more time to move funds to other accounts.
By allowing disputes to be initiated directly within the banking app, MED 2.0 reduces friction and enables financial institutions to begin investigating suspected fraud more quickly.
2. Chain blocking and enhanced fund tracing
Perhaps the most significant enhancement introduced by MED 2.0 is the ability to trace and temporarily block funds as they move through multiple accounts.
Under the original framework, only the account that directly received the disputed Pix payment could be blocked. If the fraudster transferred the funds elsewhere before the dispute was filed, recovery became significantly more difficult.
With MED 2.0, participating institutions can identify and monitor the flow of suspicious funds across subsequent transactions. This allows preventive blocks to be applied along potential fraud routes, making it harder for fraudsters to quickly disperse stolen money.
Consider a simple example:
A victim sends a Pix payment to a fraudster. The fraudster immediately transfers the funds to another account at a different institution. Once the victim files a dispute, participating institutions can work together to trace the movement of those funds and, when appropriate, temporarily block available balances while the investigation is conducted.
This expanded tracing capability significantly improves the likelihood that funds can be located before they disappear from the financial system.
What about legitimate recipients?
An important aspect of MED 2.0 is that it is designed to protect both fraud victims and legitimate recipients.
In exceptional circumstances, funds received by a third party acting in good faith may be temporarily blocked while the origin of the funds is investigated. However, if the recipient is determined to have no involvement in the fraud, the funds are released and remain available to that recipient.
According to the MED operational framework, financial institutions do not indiscriminately freeze accounts. Instead, they use transaction analysis and risk-based monitoring to identify potential fraud pathways and focus investigations on accounts connected to suspicious fund flows.
As a result, unnecessary blocks affecting legitimate recipients are expected to be rare.
3. More time for investigation and recovery
MED 2.0 also expands the timeframe available for financial institutions to analyze disputed transactions.
After funds are blocked, the institutions involved have up to seven days to investigate the claim and determine whether fraud has occurred.
If fraud is confirmed and funds remain available, the recovery process can be completed within up to 11 days from the initial dispute request.
It is important to note that MED 2.0 does not guarantee that funds will be recovered. Depending on the circumstances, recovery may be partial or, in some cases, impossible if the funds are no longer available.
What MED 2.0 does provide is a more sophisticated recovery framework that significantly improves the chances of locating and returning funds while strengthening trust in the Pix ecosystem.
How does the Pix dispute process work?
Although the Special Return Mechanism (MED) has been available since 2021, awareness of the feature has historically been limited among Pix users. According to a 2024 report by Finsiders Brasil, only 5% of Pix scam victims knew how to use the mechanism, while 68% had never heard of it. Another 27% were aware that it existed but did not fully understand how it worked.
This lack of awareness helps explain one of the main goals of MED 2.0: making the dispute process easier to find and use. By integrating the feature directly into participating banking applications, the Central Bank has reduced the need for users to contact customer service and made fraud reporting more accessible.
While the exact user experience may vary slightly between institutions, the process generally follows the same steps:
- Access the Pix transaction details within the banking app.
- Select the dispute option, typically available from the transaction history or Pix details screen.
- Choose the reason for the dispute and provide any supporting information or evidence, if available.
- Submit the request for review by the financial institution.
- The receiving institution is notified and, when applicable, preventive measures may be taken to secure available funds while the investigation is conducted.
Users have up to 80 days after the original transaction to submit a dispute request. However, timing is critical. The sooner a case is reported, the greater the likelihood that funds can be identified and recovered before they are transferred to additional accounts.
It is important to remember that MED applies only to cases involving fraud, scams, or coercion. Disputes submitted through the mechanism initiate a formal investigation, and financial institutions will assess whether the transaction meets the criteria established by the Central Bank for fraud-related claims.
Why does MED apply only to fraud cases?
MED was designed specifically to address fraud, scams, and transactions made under coercion. It is not intended to resolve disagreements between buyers and sellers, such as dissatisfaction with a product, a delivery issue, or a request for a refund.
The reason lies in one of Pix’s core design principles: payment finality. When a Pix payment is completed, the recipient can generally rely on the funds as final and irrevocable. This certainty is one of the factors that has helped drive adoption among businesses, merchants, and consumers across Brazil.
MED serves as a carefully defined exception to that principle, allowing transactions to be investigated and, when appropriate, reversed in cases of suspected fraud. Expanding the mechanism to cover commercial disputes would fundamentally change the nature of the system.
Commercial disputes also differ fundamentally from fraud cases. While fraud investigations focus on whether a transaction resulted from deception or unauthorized activity, commercial disputes often involve subjective questions about whether a product or service met expectations. Investigating such claims would require reviewing contracts, invoices, delivery records, customer communications, and other evidence that falls outside the scope of a fraud investigation.
For this reason, MED is limited to fraud-related cases, preserving the finality of Pix transactions while providing a dedicated mechanism to help victims recover funds in cases involving scams, fraud, or coercion.
Why are Pix refunds different from card chargebacks?
For companies unfamiliar with Pix, one common question is why the refund and recovery process differs so significantly from card payments.
The difference lies in how the two payment methods operate.
In the card ecosystem, chargebacks were designed to handle a wide range of disputes, including fraud claims, merchant errors, duplicate charges, and disagreements related to products or services. In some cases, consumers may receive a provisional refund shortly after initiating a dispute, even while the investigation is still ongoing.
Pix operates differently because it is an instant account-to-account payment method rather than a credit-based payment system.
When a Pix transaction is completed, the funds move directly from the payer’s account to the recipient’s account within seconds. There is no card network or intermediary holding the funds while a dispute is reviewed.
As a result, recovering funds after a fraudulent Pix transaction requires a different process. Rather than reversing a transaction, financial institutions must investigate the case, trace the movement of funds, and determine whether recoverable balances remain available.
This is the role of MED 2.0. Instead of functioning as a traditional chargeback mechanism, it provides a structured framework for investigating fraud and, when possible, recovering funds for victims.
What MED 2.0 means for the Pix ecosystem
MED 2.0 is more than a new dispute feature. It’s another example of how the Pix ecosystem continues to evolve as adoption grows.
- Greater confidence for consumers: By making fraud reporting easier and more accessible, MED 2.0 helps strengthen consumer confidence in Pix. The ability to initiate a dispute directly within a banking application gives users a clearer path to report suspected fraud and seek recovery when scams occur.
- Stronger fraud prevention and recovery capabilities: The introduction of features such as chain blocking and enhanced fund tracing improves the ability of participating institutions to identify and recover funds linked to fraudulent activity. While recovery isn’t guaranteed, these enhancements increase the effectiveness of fraud investigations and improve the chances of locating recoverable balances.
- Continued payment certainty for businesses: Importantly, MED 2.0 does not transform Pix into a chargeback-based payment method. The mechanism remains limited to cases involving fraud, scams, and coercion, and Pix maintains its key advantage of payment finality. This means the ecosystem can continue to strengthen fraud protections without fundamentally changing how legitimate Pix transactions are processed.
- A more mature payments infrastructure: Taken together, these developments reflect the continued evolution of Pix as one of the world’s largest instant payment systems. Standardized dispute channels, more sophisticated fraud controls, and clearer operational procedures help strengthen the ecosystem while preserving the speed and efficiency that have driven Pix’s widespread adoption.
Whether you’re a merchant looking to accept Pix in Brazil or a payment provider expanding your local payment offering, understanding developments such as MED 2.0 is essential to navigating the Brazilian payments landscape.
Talk to our specialists to learn how PagBrasil can help you implement Pix and deliver a secure, localized payment experience for Brazilian consumers.
Frequently asked questions about MED 2.0
Can a Pix payment be reversed?
Generally, no. Pix was designed as a final and irrevocable payment method. However, in cases involving fraud, scams, or coercion, funds may be recovered through the Special Return Mechanism (MED), provided the conditions established by the Central Bank of Brazil are met.
Is MED 2.0 the same as a chargeback?
No. Unlike card chargebacks, which can be used for a variety of disputes and may temporarily reverse a transaction, MED 2.0 is a fraud recovery mechanism. Because Pix payments settle instantly, MED does not reverse completed transactions. Instead, it allows financial institutions to investigate fraud, trace the movement of funds, and recover available balances when possible. It also applies only to cases involving fraud, scams, or coercion.
Can a customer dispute a Pix payment because they are unhappy with a product or service?
No. Commercial disputes, refund requests, and customer dissatisfaction claims do not fall within the scope of MED. These situations must be resolved directly between the buyer and the seller.
Does MED 2.0 guarantee that funds will be recovered?
No. Recovery depends on several factors, including whether recoverable balances remain available in accounts linked to the fraud. MED 2.0 improves the ability to trace and recover funds, but recovery is not automatic or guaranteed.
How long does the MED process take?
Under MED 2.0, participating institutions have up to seven days to analyze a fraud claim. If fraud is confirmed and recoverable funds are available, the reimbursement process can take up to 11 days from the initial dispute request.
Can legitimate merchants have their funds blocked?
MED is intended to target accounts linked to suspected fraudulent activity. Legitimate merchants accepting Pix payments in good faith are generally not affected by the process. If a precautionary block occurs during an investigation, funds are released once the recipient is determined to be acting in good faith.
What does MED 2.0 mean for businesses accepting Pix?
MED 2.0 strengthens consumer protection and fraud recovery capabilities while preserving one of Pix’s key advantages: payment finality. For businesses, it represents another step in the continued maturity and reliability of Brazil’s instant payment ecosystem.
