Correspondent Banking Glossary

Welcome to the Acceleron Correspondent Banking Glossary!

International and cross-border payments are complex, with numerous technical terms, regulations, and financial processes shaping the global movement of money. Whether you're a banker, fintech professional, or business navigating international transactions, understanding these key concepts is essential. In this correspondent banking glossary, we break down the major terms and definitions related to wire transfers, correspondent banking, foreign exchange, regulatory compliance, and cross-border payments.

Correspondent Banking Glossary:

• What is an API?

  An API (Application Programming Interface) is a set of rules, protocols, and tools that allow different software applications to communicate with each other. Banking APIs enable seamless integration between core banking systems, third-party financial services, fintech platforms, and payment networks.

  APIs function as intermediaries, allowing banks to share data and services securely without exposing their entire system. They provide predefined request and response formats, ensuring that different applications can exchange information efficiently. APIs can be private (used internally within a bank), partner (shared with trusted third parties), or public (open banking APIs that allow third-party developers to build financial products and services).

  For example, when a customer initiates a wire transfer through a mobile banking app, APIs facilitate the transaction by connecting the app to the bank’s payment system, verifying account details, checking for fraud, and sending payment instructions to the correspondent bank.

  Read more →

• What is AML? (Anti-Money Laundering)

  Anti-Money Laundering (AML) for financial institutions are compliance regulations and processes implemented to prevent financial institutions from being used for illegal activities, such as money laundering and terrorist financing. A critical component of correspondent banking relationships.

  Read more →

• What is a BIC? (Bank Identifier Code)

  A BIC is a unique code assigned to financial institutions by SWIFT to identify the bank in international transactions, essential for cross-border payments.

  Read more →

• What is a Beneficiary Bank?

  A beneficiary bank is the bank that receives funds on behalf of the final recipient (beneficiary) of a payment. It ensures the funds are deposited into the beneficiary's account as per the payment instructions.

  Beneficiary Bank

  • Definition: The bank where the recipient (beneficiary) holds their account and will ultimately receive the funds.

  • Role: Responsible for crediting the recipient’s account once the funds arrive from the sender's bank or through any intermediary banks used in the transaction.

  • Example: If you send money from a bank in the U.S. to someone’s account at HSBC in London, HSBC in London is the beneficiary bank.

  Watch video for more →

• What is BIS?

  BIS (Bank for International Settlements) is an international organization based in Basel, Switzerland that serves as a bank for central banks, helping coordinate monetary and financial stability across countries. It's a key source of research and standards on correspondent banking, including tracking the global decline in correspondent relationships and publishing guidance on how banks manage cross-border payment risk.

  Read The Year in Cross-Border Payments and Correspondent Banking guide →

• What are Blockchain Payments?

  Blockchain payments are processed using blockchain technology, a distributed digital ledger that records transactions across multiple computers in a secure, transparent, and immutable manner which provides secure and transparent transactions without intermediaries.

• What are CBDCs? (Central Bank Digital Currencies)

  CBDCs are digital forms of a country's fiat currency issued and regulated by its central bank, offering secure and efficient payment solutions in domestic and international transactions.

• What is Clearing?

  Clearing is the process of reconciling payment instructions between banks before settlement to ensure accurate transaction execution, a key part of correspondent banking functions.

• What is Compliance Screening?

  Compliane screening is the process of reviewing transactions against regulatory and sanctions lists to ensure compliance with laws and regulations, critical in mitigating correspondent banking relationship risks.

  Read more →

• What is a Correspondent Account?

  A correspondent account is a bank account maintained by one financial institution at another to facilitate international payments and services, essential for cross-border payment operations.

• What is a Correspondent Bank?

  A correspondent bank is a financial institution that provides services on behalf of another bank, typically in a foreign country. Correspondent banks facilitate international transactions, including wire transfers, foreign exchange, trade finance, and payment processing, allowing domestic banks to access global financial networks without having a direct presence in those markets. These relationships are governed by correspondent banking agreements.

  Read more →

• What is a Correspondent Banking Agreement?

  A correspondent banking agreement is a formal contract outlining the terms and conditions of services provided by one bank to another in a correspondent banking relationship, including FX conversion and wire transfer automation.

• What are Cross-Border Payments?

  Cross-border payments are transactions where money is transferred between individuals or entities in different countries, often facilitated by correspondent banking services.

  Read more →

• What are Currency Cut-Off Times?

  Currency cut-off times are specific times at which banks stop processing transactions for certain currencies each day, impacting the efficiency of wire transfer automation.

• What is Data Exchange in Banking?

  Data exchange in the banking industry refers to the methods and protocols used to share information between financial institutions, third-party service providers, and regulatory bodies. Efficient data exchange is crucial for operations such as payment processing, compliance reporting, and customer account management.

  Read more →

• What is De-risking?

  De-risking is the trend of correspondent banks terminating or restricting business relationships to avoid risk. De-risking threatens the stability and operational efficiency of smaller community banks that rely heavily on these relationships to offer comprehensive international services to their customers.

  Read more →

• What is an E-Wire?

  An e-wire is an electronic wire transfer method used for moving funds quickly and securely between banks, enhancing wire processing efficiency. E-Wire is commonly used for both domestic and cross-border payments, integrating with financial networks such as SWIFT, Fedwire, or ISO 20022-compliant systems to streamline the movement of funds while ensuring compliance with regulatory and anti-money laundering (AML) requirements.

• What are FBOs? (Foreign Banking Organizations)

  FBOs (Foreign Banking Organizations) are banks chartered outside the United States that establish a branch, agency, or other presence in the U.S. to conduct banking business, placing them under Federal Reserve oversight. Because FBOs often lack direct access to U.S. dollar clearing, they frequently rely on correspondent banking relationships to process cross-border transactions.

• What are FBO (For Benefit Of) Accounts?

  FBO accounts, short for “For Benefit Of,” let a bank hold funds on behalf of a fintech’s customers. The bank typically holds the funds in the FBO account, while the fintech manages the customer experience and keeps a record of each customer’s balance through a sub-ledger. This allows the fintech to track individual customer funds without each customer needing a separate bank account. FBO accounts are commonly used in banking-as-a-service (BaaS), fintech, and payments.

• What is FedNow?

  Fednow is an instant payment system operated by the Federal Reserve that allows financial institutions of all sizes across the U.S. to offer instant payments to their customers. Transactions settle in real-time, 24/7/365 (including nights, weekends, and holidays). Fednow is always available, unlike Fedwire, which has specific operating hours. Use Cases include instant payroll, bill payments, account-to-account transfers, emergency disbursements, and person-to-person (P2P) payments. Fednow allows banks and credit unions to offer faster payments to their customers.

• What is Fedwire?

  Fedwire is a real-time gross settlement (RTGS) system operated by the Federal Reserve in the United States. It facilitates high-value, time-sensitive electronic funds transfers between banks, credit unions, and other financial institutions. Fedwire is primarily used for domestic interbank payments, large corporate transactions, and government transfers within the U.S.

  The key differences between FedNow and Fedwire revolve around speed, availability, and purpose:

  1. Speed & Settlement

  • FedNow: Designed for instant payments, settling transactions in real-time (within seconds). It is ideal for consumer and business payments that require immediate funds availability.

  • Fedwire: Operates as a same-day payment system, with transactions typically processed within minutes to hours during operating hours. It is primarily used for large-value, high-priority transactions.
    
    

  2. Availability

  • FedNow: 24/7/365 availability, allowing for continuous, real-time transactions.
  • Fedwire: Operates only during business hours (Monday-Friday, 9:00 AM – 7:00 PM ET), with no weekend or holiday availability.

  
  

  3. Use Cases

  • FedNow: Supports instant payments for everyday transactions, including P2P (peer-to-peer), B2B (business-to-business), payroll, bill payments, and merchant transactions.
  • Fedwire: Used for high-value, time-sensitive transactions, such as interbank settlements, corporate treasury payments, and large business transactions.

  
  

  4. Cost & Transaction Limits

  • FedNow: Lower-cost transactions, with limits set by financial institutions (initial limit per transaction is $500,000, but banks can set lower thresholds).
  • Fedwire: Higher transaction fees, but no official transaction limit (some banks may impose limits).

  
  

  5. Type of Clearing & Settlement

  • FedNow: Uses instant settlement via a central bank account, meaning funds are immediately available to the recipient.
  • Fedwire: Uses real-time gross settlement (RTGS), meaning transactions are processed one by one.

  
  

  6. Target Users

  • FedNow: Aimed at businesses, individuals, and financial institutions that need real-time payments.
  • Fedwire: Primarily used by banks, corporations, and government entities for large-scale, high-value transactions.

  
  

  Bottom Line

  • FedNow is faster, always available, and designed for instant, low-value transactions.
  • Fedwire is a high-value, interbank settlement system that operates only during business hours.

• What is Foreign Exchange (FX)?

  Foreign exchange (FX) refers to the global marketplace where currencies are traded. It is the largest and most liquid financial market in the world, enabling businesses, governments, financial institutions, and individuals to buy, sell, exchange, and speculate on currency values.

  Read more →

• What is FX Conversion?

  FX conversion is the process of exchanging one currency for another during an international payment or transaction, an important aspect of correspondent banking services.

  Watch video for more →

• What is an FX Spread? (Foreign Exchange Spread)

  The FX spread is the difference between the price a financial institution pays to buy a currency and the price at which it sells that currency. In a customer transaction, the spread is built into the exchange rate the customer receives. The larger the spread, the more the customer pays for the currency conversion.

  For banks and other financial institutions, the FX spread can be an important source of non-interest income, particularly when the institution handles international payments or foreign currency transactions.

  Read more →

  Read more →

• What is Hashing?

  Hashing refers to a unique cryptographic identifier generated from a transaction’s details, ensuring data integrity and security during payment processing. Hashes are commonly used in message authentication, reconciliation, and fraud prevention within cross-border wire transfers.

  A hash is created using a mathematical algorithm (such as SHA-256) that converts transaction data — like sender and recipient details, amount, and timestamp — into a fixed-length alphanumeric string. Even a minor change in the transaction data results in a completely different hash, making it a vital tool for detecting tampering or unauthorized modifications.

  How It’s Used in Correspondent Banking

  • Transaction Verification: Ensures that payment instructions have not been altered during processing.
  • Secure Messaging (e.g., SWIFT): Used in payment messages to confirm data integrity between correspondent banks.
  • Audit & Compliance: Provides a digital fingerprint for transaction tracking and regulatory reporting.
  • Fraud Prevention: Helps banks validate authenticity and detect inconsistencies in cross-border payments.

• What is Hedging?

  Hedging is a financial strategy that includes locking in currency rates through instruments like forwards, options, and swaps to mitigate currency fluctuations.

• What is an IBAN? (International Bank Account Number)

  An IBAN is a standardized international numbering system used to identify bank accounts across borders, ensuring accurate payment routing to the correct recipient's account for international payments automation.

  The IBAN consists of a maximum of 34 alphanumeric characters and contains a number of components including a country code, followed by check digits provided by the issuing financial institution, a bank identifier code, and a basic bank account number.  

  Hypothetical example:  

  DE44 1234 5678 9123 4567 00 

  Country code - DE (Germany)

  Check code - 44

  Bank code - 12345678

  Account number 9123456700

   

• What are Incoming Wires?

  Incoming wires are wire transfers received by a financial institution on behalf of its clients, typically from another bank through a correspondent banking relationship. International incoming wires can create operational challenges when payment messages arrive with missing, incomplete, or inconsistent information, requiring bank staff to research transactions and manually gather the details needed to process them. Modern correspondent banking software can help address these issues by validating payment data, automating workflows, and providing the information banks need to process incoming wires more efficiently.

  Read more →

• What are Instant Payments?

  Instant payments are part of real-time payment systems that allow funds to be transferred and settled between parties almost instantly, offering enhanced speed and convenience for domestic and international transactions.

  Read more →

• What is an Intermediary Bank?

  Intermediary banks facilitate international transactions by acting as an intermediary between the sending and receiving banks, playing a crucial role in cross-border payments.

  Intermediary Bank

  • Definition: A bank that facilitates the transfer of funds between the sender's bank (originating bank) and the beneficiary bank when there is no direct relationship between them.

  • Role: Acts as a bridge to route the payment to its final destination, usually charging a fee for the service. It's common in international payments where the sender’s bank does not have a direct relationship with the beneficiary bank.

  • Example: If a small community bank in the U.S. doesn’t have a direct relationship with HSBC in London, it might route the payment through another correspondent bank, which serves as the intermediary.

  Key Differences

  Aspect	Beneficiary Bank	Intermediary Bank
  Purpose	Receives and credits funds to recipient	Facilitates funds transfer between banks without a direct relationship
  Relationship	Direct relationship with the recipient	Typically no direct relationship with sender or recipient
  Fees	May charge a fee for receiving funds	Often charges fees for processing and forwarding the payment
  Visibility	Known to the recipient	May or may not be visible to the recipient, depending on the transaction setup

   

  Watch video for more →

  Read more →

• What is ISO 20022?

  ISO 20022 is a global standard for electronic data exchange between financial institutions, enabling streamlined and enriched messaging formats for international wires automation.

  Read our ISO 20022 guide →

• What is KYC? (Know Your Customer)

  KYC (Know Your Customer) is a regulatory requirement for banks to verify the identity of their customers and assess potential risks for illegal activities, an essential step when forming correspondent banking relationships.

• What is a Liquidity Provider?

  A liquidity provider is a financial institution or other market participant that buys and sells assets, such as currencies, at quoted prices. By providing a steady source of buyers and sellers, liquidity providers make it easier to execute transactions without significantly affecting the market price. In foreign exchange, liquidity providers can include banks, financial institutions, and specialized FX firms that provide currency prices to other financial institutions and businesses.  

  Acceleron works with multiple liquidity providers that compete to provide competitive FX rates, helping banks lower their costs while adding redundancy to their payment network.

  Read more →

• What are MT Messages?

  MT messages are legacy standardized message formats used in SWIFT communications and data exchange for specific types of international wire transactions, such as customer credit transfers (MT103) or financial institution transfers (MT202).

  Read more in our ISO 20022 guide →

• What are MX Messages?

  MX messages are new rich data messaging standard that replaces MT messages, used for ISO 20022 compliance to provide enriched transaction data and improve cross-border payment accuracy and efficiency.

  Read more in our ISO 20022 guide →

• What is Nesting? (Nested Correspondent Banking)

  Nesting happens when a respondent bank lets another bank use its correspondent account to process transactions, without the correspondent bank's knowledge of that third bank's activity. It's a major red flag in AML compliance because it hides the true source of transactions from the correspondent bank's monitoring, making it harder to catch suspicious activity.

• What is a Nostro Account?

  A Nostro account (Latin for "ours") is a foreign currency account that a domestic bank holds with a bank in another country. It allows the domestic bank to conduct transactions in the foreign currency of that country. Nostro accounts are commonly used in international trade and foreign exchange transactions to facilitate cross-border payments and settlements.

• What is OFAC? (Office of Foreign Assets Control)

  OFAC (Office of Foreign Assets Control) is a U.S. government agency responsible for enforcing economic and trade sanctions against targeted foreign entities, integral to compliance screening.

• What are Outgoing Wires?

  Outgoing wires are wire transfers sent by a financial institution on behalf of its clients, typically to another bank.

• What is a pacs.008 Message?

  pacs.008 (ISO 20022) is a financial institution to financial institution customer credit transfer.

  This ISO 20022 message type is used to transmit a customer credit transfer from one financial institution (the debtor agent) to another (the creditor agent). It serves as the interbank delivery mechanism for the payment instruction once a payment has been initiated. The content typically includes essential details such as transaction amounts, debtor and creditor accounts, and agent information. 

  Usage Context

  • The pacs.008 message is employed for transmitting actual payment orders between financial institutions, including SEPA Credit Transfers, SWIFT-based interbank transfers, TARGET2 (and its successor systems), and within the CBPR+ framework used for cross-border ISO 20022 messaging.

  • Comparable in ISO 20022 to the MT‑103 type messages in SWIFT’s traditional FIN format.

   

• What is a Payable-Through Account?

  A payable-through account is an account at a correspondent bank that lets a respondent bank's own customers conduct transactions directly, essentially giving outside customers indirect access to the correspondent bank's systems. Because the correspondent bank has limited visibility into who's actually using the account, payable-through accounts carry higher AML risk and require closer monitoring.

• What is a Payment Rail?

  A payment rail is the network or infrastructure used to process and settle payments, such as SWIFT, ACH, cards, or blockchain.

• What is Reconciliation?

  Reconciliation is the financial process of verifying and matching transactions across different accounts, records, or systems to ensure accuracy and consistency. Often performed daily, and sometimes in real-time, reconciliation is a critical function in banking, payments, and accounting, helping institutions detect discrepancies, prevent fraud, and comply with regulatory requirements.

• What is Regulation E?

  Regulation E (Reg E) governs electronic fund transfers (EFTs) and remittance transfers, ensuring consumer protection in transactions such as ACH payments, ATM withdrawals, debit card transactions, and wire transfers initiated from consumer accounts. Under Reg E, financial institutions must provide clear disclosures on fees, transaction limits, and consumer rights. The regulation also establishes strict error resolution procedures, requiring banks to investigate and respond to unauthorized transactions or disputes within specific timeframes. Consumer liability for unauthorized transactions is limited, provided they report the issue promptly.

  For bankers, Reg E compliance means maintaining robust fraud detection, transaction monitoring, and customer notification systems to prevent unauthorized activity and meet disclosure requirements. The regulation also impacts remittance transfers, mandating clear fee and exchange rate disclosures, cancellation rights, and refund procedures. Failure to comply can result in regulatory penalties and reputational risk, making adherence to Reg E a key component of consumer protection and risk management in retail banking.

• What is a Respondent Bank?

  A respondent bank is the bank that receives services from a correspondent bank, typically because it doesn't have a direct presence or account access in the market where it needs to send or receive payments. In a correspondent banking relationship, the respondent bank relies on its correspondent to clear and settle transactions on its behalf in that foreign market.

• What is Sanctions Screening?

  Sanctions screening is the practice of checking transactions and clients against sanctions lists to avoid illegal dealings, a key component of AML compliance.

• What is SEPA? (Single Euro Payments Area)

  The Single Euro Payments Area (SEPA) is an initiative by the European Union (EU) to standardize and streamline electronic payments across 38 European countries. SEPA enables individuals, businesses, and governments to send and receive euro-denominated payments under the same conditions, regardless of whether the transaction is domestic or cross-border.

  Key Features of SEPA

  Unified Payment Standards:
  

  • SEPA eliminates differences between domestic and cross-border euro payments, ensuring they follow the same rules and processing times.
  • It standardizes credit transfers, direct debits, and card payments.
    

   

  Geographic Scope:

  • Covers EU member states plus additional European countries, including Iceland, Norway, Liechtenstein, Switzerland, Monaco, and the UK (for certain transactions).

   

  Euro-Denominated Transactions:

  • SEPA applies only to payments in euros (€), even if one or both parties are outside the Eurozone.

   

  Cost Efficiency & Transparency:

  • Banks must charge the same fees for domestic and cross-border SEPA transactions.
    
    

• What is a Shell Bank?

  A shell bank is a bank that's licensed in a country but has no physical presence there and isn't affiliated with a regulated financial group. Because shell banks are harder to monitor and have been linked to money laundering, correspondent banks are required to screen for them and generally won't open or maintain accounts for them.

• What is a Stablecoin?

  A stablecoin is a type of cryptocurrency designed to maintain a stable value by being pegged to a reserve asset, such as fiat currency.

  Read more →

• What is SWIFT?

  The Society for Worldwide Interbank Financial Communication (SWIFT) is a global messaging network used by banks and financial institutions to conduct international payments and securely exchange data on financial transactions.

• What is a SWIFT Code?

  A SWIFT code, also known as a BIC (Business Identifier Code), is a unique identifier used to identify a bank or other financial institution in international payments. It helps banks and payment providers identify the financial institution involved in a cross-border transaction and route the payment to the correct destination.

  Read more →

• What is Transaction Monitoring?

  Transaction monitoring is the ongoing process of analyzing transactions for unusual or suspicious activity as part of banking compliance and AML practices.

• What is the Travel Rule?

  The Travel Rule is a regulation under the Bank Secrecy Act (BSA) that mandates financial institutions to include and transmit specific information about the originator and beneficiary in transmittals of funds equal to or exceeding $3,000. This rule aims to assist law enforcement agencies in detecting, investigating, and prosecuting money laundering and other financial crimes by preserving an information trail about persons sending and receiving funds through funds transfer systems. 

  The Travel Rule applies to various financial institutions, including banks, securities brokers or dealers, casinos subject to the BSA, and money transmitters. It is important to note that transmittals of funds governed by the Electronic Funds Transfer Act (Regulation E) or made through ATM or point-of-sale systems are not subject to this rule. 

• What is Tokenization?

  Tokenization is a security technology commonly applied to card payments and stored payment data. It's used in banking and payments to protect sensitive data by replacing it with a unique, non-sensitive equivalent known as a token. The token acts as a reference to the original data but has no exploitable value if intercepted. The actual data is securely stored in a token vault or encryption system, ensuring it remains protected from fraud and breaches.

  Purpose: Protects sensitive financial data, especially in stored or recurring transactions.

  How It Works:

  • Instead of transmitting actual payment data (e.g., account numbers, credit card numbers), a random token is generated.
  • The token is sent across the network, and only authorized parties (such as the issuing bank) can decrypt or map it back to the original data.
  • Often used in credit card transactions, ACH payments, and stored payment credentials for compliance with PCI DSS (Payment Card Industry Data Security Standard).

• What are Tokenized Deposits?

  Tokenized deposits are traditional bank deposits represented digitally on a blockchain or other digital ledger. The deposit remains on the bank’s balance sheet and is still subject to the rules that govern traditional bank deposits. What changes is how the deposit can move: instead of relying solely on traditional payment rails, it can be transferred using blockchain-based technology, potentially enabling faster, 24/7 payments and programmable transactions.

  Unlike a stablecoin, a tokenized deposit is the bank deposit itself, not a separate token backed by reserves.

  Read more →

• What is UETR? (Unique End-to-End Transaction Reference)

  UETR (Unique End-to-End Transaction Reference) is a globally unique identifier assigned to each SWIFT payment transaction to enhance traceability, transparency, and tracking in cross-border payments. It is a randomly generated 36-character UUID (Universal Unique Identifier), ensuring that no two transactions have the same reference. It is used to monitor payments status in real time. Once generated for a transaction, it remains unchanged. 

  Hypothetical UETR:

  b8a4f72e-12c4-4381-a551-7d1a3a8764c4

   

  Read our ISO 20022 guide →

• What is a Vostro Account?

  Vostro Account (Latin for "yours") refers to an account that a domestic bank holds on behalf of a foreign bank, denominated in the local currency of the domestic bank’s country. In correspondent banking, a foreign financial institution maintains a Vostro account with a domestic correspondent bank, enabling it to process transactions in the domestic currency.

• What is Wire Automation?

  Wire automation refers to the use of technology to streamline and optimize the processing of wire transfers, reducing manual intervention, minimizing errors, and increasing transaction speed. Banks, financial institutions, and businesses leverage wire automation to enhance efficiency, compliance, and cost savings in domestic and international payments.

  Read more →

• What is a Wolfsberg Questionnaire?

  The Wolfsberg Questionnaire is a standardized due diligence form that correspondent banks use to evaluate a respondent bank's AML controls before starting or continuing a banking relationship. It covers things like ownership structure, compliance programs, and sanctions screening, and has become a common industry baseline for correspondent banking risk assessment.