Starting from February 2nd, the new security rules for Pix set by the Central Bank of Brazil have been officially implemented, with a focus on faster recovery of improperly transferred funds. To combat fraud, deception, coerced transfers, and other illicit activities, relevant mechanisms have been strengthened. The most significant change is the enhancement of the Special Refund Mechanism (MED), making the tracking of fund flows more efficient.

Even if funds are swiftly transferred to other accounts—a common tactic in financial fraud crimes—the related funds will continue to be tracked. Under the new system, the Central Bank expects to significantly increase the rate of fund recovery and reduce the probability of successful fraud. Experts estimate that these changes could lead to a reduction of up to 40% in cases of fraud that are "successfully executed."

Another important measure is the strengthening of collaboration between banks, payment institutions, and security departments, while expanding the use of self-service options in banking applications to simplify and expedite the process of filing complaints for users.

The Central Bank emphasizes that the MED is only applicable in cases of fraud, suspected fraud, or financial institution errors. If a Pix instant transfer is made due to a user's erroneous entry of the recipient's key information, the function cannot be used to recover the funds.

As early as October last year, the Central Bank of Brazil had mandated that all financial institutions provide a one-click complaint button in their applications to enable the MED function, preparing for the mandatory implementation of the new rules.