A
Account Identifier
The banking details used to receive or send a Pix without a Pix key. Includes: bank (ISPB), branch, account number, and account type (CACC, SVGS, SLRY, TRAN).Alias (Pix Key)
See Pix Key below.B
Bacen / BACEN
Banco Central do Brasil — the regulatory authority responsible for designing, operating, and supervising Pix.BacenJud / SPI Gateway Certification
A mandatory certification process required for participants that connect directly to the Pix infrastructure (SPI/DICT). Ensures cryptographic and operational compliance.C
Cash-In
A Pix received from an external sender into the institution’s account.Cash-Out
A Pix sent from the institution to an external recipient.Charge (Pix Cobrança)
Payment request issued via Pix, often with due dates, penalties, and interest rules. Used mainly for invoices and billing.Claim (Portability & Ownership)
A regulatory workflow used to transfer or confirm ownership of a Pix key between institutions. There are two types:- Portability – moving a key to another institution
- Ownership Claim – asserting ownership when a key is registered inconsistently
Confirmation Window
The allowed time for a user to approve or reject a Pix key portability or ownership claim.CICC / Câmaras Interbancárias
Clearing houses connected to BACEN systems; referenced in certain regulatory flows.D
DICT (Directory of Transactional Account Identifiers)
BACEN’s official directory of Pix keys. Stores:- key type
- owner (CPF/CNPJ)
- associated account
- creation & update history
Direct Participant
An institution that connects directly to SPI and DICT with its own certified infrastructure.Dynamic QR Code
A one-time-use QR Code containing full payment details, including value, expiration, and transaction metadata. Supports Cobrança Pix and automated reconciliation.Due Date Charge (Cobrança com Vencimento)
A Pix charge with a predefined due date and rules for penalties, discounts, and interest.E
E2E ID (End-to-End Identifier)
A unique identifier generated for every Pix transaction. Used for:- traceability
- dispute resolution
- reconciliation
- fraud analysis
F
FRA (Fraud-Related Refund Request)
A special refund mechanism triggered when a transaction is identified as fraudulent. Governed by strict deadlines and workflows.G
Gateway (SPI/DICT Gateway)
The secure communication channel used by direct participants to connect to BACEN’s Pix systems.I
Immediate Pix
A transfer settled instantly (typically < 10 seconds) through SPI.Indirect Participant
An institution that offers Pix through a Direct Participant, instead of connecting directly to BACEN.ISPB
Identificador de Sistema de Pagamentos Brasileiro — the unique numerical identifier of every financial institution in Brazil.K
KYC (Know Your Customer)
Regulatory verification of customer identity used to prevent fraud and ensure DICT accuracy.L
Limits (Pix Limits)
BACEN-defined and institution-defined rules restricting the maximum value a user can send or receive within certain windows (daytime, nighttime, custom limits).M
MED (Mecanismo Especial de Devolução)
The Special Refund Mechanism for fraud or operational error cases. Allows institutions to:- request refunds
- analyze fraud claims
- return funds following mandatory rules
Merchant Initiated Pix
When a business triggers a Pix charge using static or dynamic QR Codes.O
Ownership Claim
A process for asserting that the customer is the rightful owner of a Pix key held by another institution.P
Participant (Direct / Indirect)
Institutions authorized by BACEN to offer Pix services.Payer
The sender of a Pix transaction.Payee
The receiver of a Pix transaction.PSTI (Provedor de Serviços de Tecnologia da Informação)
BACEN-regulated technology provider that allows institutions to connect to the national financial network (RSFN) for Pix. Used when the institution does not maintain its own direct infrastructure.Portability (Key Portability)
Moving a Pix key from one institution to another, with customer consent.Pix Key
A unique identifier used as a shortcut for receiving payments. Types include:- CPF
- CNPJ
- Phone number
- EVP (random key)
Pix Saque
Withdrawal of physical cash using Pix at ATMs or merchants.Pix Troco
Cash withdrawal combined with a purchase: customer pays more than the purchase amount via Pix and receives the difference in cash.Q
QR Code — Static
Single QR Code reused for multiple payments; customer enters the value manually.QR Code — Dynamic
Single-use QR Code containing full payment data. Automatically expires.R
Refund (Devolução)
Reversing a Pix transaction. Types include:- standard refund
- partial refund
- special refund (MED)
Reconciliation
Matching Pix events (sent, received, confirmed) across SPI, DICT, ledger, and internal records.RSFN (Rede do Sistema Financeiro Nacional)
The secure national network used for communication with BACEN systems.S
SPI (Instant Payment System)
BACEN’s infrastructure that routes and settles Pix transactions in real-time.Static QR Code
Reusable QR Code linked to a Pix key. Does not expire.Settlement
The moment funds are effectively transferred between institutions in SPI.T
Transaction ID
Unique identifier created by the initiating institution to track a Pix payment.Transaction Status
Positions include:- Pending
- In Analysis
- Completed
- Refunded
- Failed