Core Pix domains
DICT — Pix Key Directory
The DICT is the national registry of Pix keys. It maps simple identifiers (CPF/CNPJ, phone, email, random key) to transactional accounts, allowing users to send and receive Pix without entering full banking details.Pix Transactions
Handles the execution lifecycle of instant payments — authorization, validation, settlement, status updates, and traceability. Every transaction flows through regulated paths and must settle within seconds in the SPI infrastructure.QR Codes
Pix supports static and dynamic QR Codes for payment initiation. Static codes are reusable; dynamic codes are generated per transaction and can include amount, metadata, and expiration.MED — Special Refund Mechanism
The Mecanismo Especial de Devolução governs fraud-related refund scenarios. It defines mandatory rules, timelines, and workflows for disputes, error handling, and fraud investigation across institutions.Additional Pix characteristics
Alongside its functional domains, Pix operates under a set of system-wide principles designed to ensure safety, inclusiveness, and nationwide compatibility.
Universal interoperability
Every participant in Pix communicates through shared standards — no closed networks, no proprietary protocols. Any institution can send and receive Pix to any other.Regulatory standardization
BACEN defines the rules, message formats, limits, fraud controls, and operational requirements. All participants must follow the same specifications.Open participation model
Pix was built to support a wide variety of institutions, including:- Banks
- Payment institutions
- Fintechs
- Digital wallets
- Cooperatives
- Government entities
Security posture
Pix enforces a strict security framework with:- Strong encryption
- Standardized authentication and authorization
- Mandatory fraud-prevention processes
- Full auditability and traceability of every event