Misc Payment Concepts
Provides a compact glossary of foundational terms such as SWIFT, SEPA, ISO 20022, payment infrastructures, and related standards.
Topic archive
Payments - Introduction
Plain-language learning briefs that route you to the key ideas, operational questions, and practical context for this part of the payment ecosystem.
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All Payments - Introduction briefs
Charges and FOREX (FX)
Explains common payment charge allocations and how foreign-exchange conversion and margins affect cross-currency transfers.
Payment Engines
Introduces the bank software that validates, routes, enriches, and processes incoming and outgoing credit transfers at scale.
Accounting Entries in Payments
Uses debit and credit entries to illustrate how customer, bank, and correspondent accounts reflect the movement of payment funds.
Payment Messages
Explains how customer and interbank messages carry payment instructions and status information across an end-to-end transfer.
Parties in a Payment System
Identifies the customers, banks, intermediaries, and market infrastructures that initiate, route, settle, and receive payments.
INTRODUCTION – FUNDS TRANSFER
Uses a simple two-bank example to explain how an online transfer becomes an interbank message and moves through clearing and settlement.
Liquidity and settlement risk in payment systems
Explains how banks fund settlement across real-time gross and deferred net systems, what intraday liquidity is, and how payment queues and settlement risk shape when a payment actually moves.
Payment exceptions and investigations
Describes how operations teams triage failed, rejected, and queried payments, how they establish where the funds and settlement stand, and how an investigation case is opened, chased, and closed on evidence.
Reconciliation in payments
Explains how banks match internal ledgers against nostro statements and clearing reports to prove recorded money equals actual money, and how unmatched items, called breaks, are found, investigated, and cleared.
Security and fraud controls in payment operations
Explains where access control, segregation of duties, dual authorization, and screening and fraud checkpoints sit inside payment operations, and how these layered controls protect payments by detecting, reviewing, and escalating what looks wrong.
IBAN and BIC: anatomy and validation
Breaks down the structure of an International Bank Account Number and a Business Identifier Code, explains how the IBAN's mod-97 check digits work, and shows why validating both catches routing errors early.
Push versus pull payments
Push and pull payments differ by which party starts the transfer. A push is initiated by the payer, a pull is collected by the payee under prior authority, with credit transfers and direct debits as the standard examples.
Domestic versus cross-border payments
Compares a same-country payment with one that crosses a border, showing how differing currencies, correspondent banks, longer timelines, higher cost, and additional compliance checks turn a single hop into a multi-party chain.
The four-corner model
Explains the four parties in a typical payment — payer, payer's bank, payee's bank, and payee — and how a scheme or network in the middle connects the two banks so each joins once and can reach all the others.
Standing orders and scheduled payments
Explains how standing orders and scheduled credit transfers repeat a fixed payment on the payer's instruction, who controls them, and why they differ from a direct debit, where the payee collects and can vary the amount.
BIC versus LEI: payment reference data
A BIC (Business Identifier Code) identifies a financial institution so a payment can be routed to it, while an LEI (Legal Entity Identifier) identifies a legal entity for transparency. The two are structured differently and complement each other in modern payments.
Payment market infrastructures
A tour of the interbank systems that clear and settle payments — TARGET2 and EURO1 in Europe, Fedwire, CHIPS and FedNow in the United States, and CHAPS in the United Kingdom — and how real-time gross settlement differs from net settlement.
Settlement risk and CLS
Settlement risk is the danger that one side of a trade completes while the other fails. In foreign exchange this is Herstatt, or principal, risk — reduced by settlement finality, payment-versus-payment, and the CLS system.
Liquidity saving and gridlock resolution
Real-time gross settlement systems settle payments one by one, yet still economise on cash. Central queues, bilateral and multilateral offsetting, and liquidity-saving mechanisms let banks settle more payments with less intraday liquidity and break gridlock.
Confirmation of Payee (UK)
Confirmation of Payee is the United Kingdom's pre-payment name-checking service. Before a sterling transfer is sent, it tells the payer whether the name they typed matches the account holder, returning a match, close match, or no match, and it compares closely with the euro area's Verification of Payee.
Open banking, PSD2, and payment APIs
Open banking lets licensed third parties access bank accounts, with the account holder's consent, through standard interfaces. This article explains PSD2, payment initiation and account information services, and the security rules that govern them.
Instant payments around the world
Many countries now run payment systems that move money between accounts in seconds, at any hour, with final settlement. This article compares the major instant schemes and explains what they share and how they differ.
Proxy and alias addressing
Proxy addressing lets a payer send money using a phone number, email, or identifier instead of a full account number, with a central directory resolving it. This article explains the mechanism, its benefits, and its risks.
Payments regulators and oversight
Payments are governed by several kinds of body: central banks that operate and oversee systems, scheme owners that set rules, and conduct and competition regulators. This article explains who does what and why oversight matters.
Cheques and paper instruments
How cheques and other paper instruments work, how modern image-based clearing settles them, why they persist in some markets, and how they compare with electronic transfers.
CBDC and digital money
A central bank digital currency is a digital form of central-bank money. This article explains wholesale and retail designs, why central banks study them, and how they sit alongside commercial-bank money and existing payment rails.
Stablecoins and crypto rails
Stablecoins are tokens intended to hold a stable value against a currency. This article explains how distributed-ledger rails move value, where these tokens touch regulated payments, and the risks that come with them.
Cross-border payment networks
Money crosses borders through more than the correspondent-banking chain. This article explains closed-loop networks, payment aggregators, card-scheme cross-border rails, and the quote-then-pay API model many modern networks use.
The Fedwire Funds Service
The Fedwire Funds Service is the Federal Reserve's real-time gross settlement system for high-value US dollar payments, settling each transfer individually and with finality in central-bank money.
CHIPS: clearing and netting
CHIPS is a privately operated US high-value payment system that continuously matches and releases payments against running net positions during the day, then settles net balances at day's end over Fedwire.
TIPS: instant settlement in central-bank money
TIPS is a Eurosystem service that settles instant payments individually, in central-bank money, around the clock, underpinning pan-European instant credit transfers and reducing settlement risk.
Swiss Interbank Clearing: SIC and euroSIC
SIC is Switzerland's real-time gross settlement system for Swiss francs, operated by SIX for the Swiss National Bank with a cover check before settlement; euroSIC handles euro payments and is being discontinued at the end of 2027.
Thunes and quote-then-pay cross-border networks
How modern application programming interface based cross-border networks use a quote-then-pay model — locking an exchange rate for a short window, then submitting a payment order against that quote and tracking payout status through callbacks, illustrated with Thunes.
Mastercard Cross-Border Services
How a card-scheme cross-border service exposes a request and response API — payment requests with pre-agreed or one-shot quotes, balance requests, retrievable payment responses, and requests for information — illustrated conceptually with Mastercard Cross-Border Services.
How a payment hub works: product capabilities
A payment hub is the central engine a bank uses to receive, standardise, validate, enrich, and route payments. This article describes the capabilities that leading hub products share, without naming any single vendor.
Payment message templates
A template is a reusable starting point that fixes a payment's message type and format and pre-fills standing fields. This article explains how templates help operators capture payments quickly and consistently.
US ACH and National Settlement
The US Automated Clearing House (ACH) moves high-volume, low-value credit and debit transfers in batches and settles net positions across banks' Federal Reserve accounts.
US Real-Time Payments (RTP)
The RTP network from The Clearing House is a US instant-payment rail that runs around the clock, uses ISO 20022 messages, and settles with immediate finality against a prefunded account at the Federal Reserve.
Canada's Lynx RTGS
Lynx is Canada's high-value real-time gross settlement system, operated by Payments Canada and settling in Bank of Canada money, with mechanisms that balance immediate finality against efficient use of liquidity.
China's CIPS and CDFCPS
CIPS clears and settles cross-border and offshore renminbi payments, while CDFCPS refers to China's domestic clearing arrangements; the two serve different participants and purposes.
Hong Kong's CHATS: A Multi-Currency RTGS
The Clearing House Automated Transfer System (CHATS) is Hong Kong's high-value settlement system, unusual for running real-time settlement in four currencies side by side.
India's UPI and IMPS: An Overlay on Instant Rails
India's Immediate Payment Service moves money between banks instantly around the clock, and the Unified Payments Interface layers a simple addressing and app model on top of those rails.
Australia's NPP and Distributed Clearing
Australia's New Payments Platform clears instant payments in a distributed way — banks exchange messages directly and each payment settles individually in central-bank money.
T2 and Central Liquidity Management
T2 is the Eurosystem's high-value settlement system that replaced TARGET2 in 2023, splitting central-bank operations and high-value payments across separate accounts behind one shared gateway.
Book and On-Us Payments
A book payment moves money between two accounts held at the same bank, settled on that bank's own ledger. When the payer and payee are both customers of one bank, the payment is on-us: fast, cheap, and with no interbank settlement to arrange.
Risks in Payment Systems
Payment systems carry credit, liquidity, settlement, operational, systemic, and legal risk. This guide names each risk plainly and explains the main mitigations, from settlement in central-bank money to payment-versus-payment and netting with finality.
Non-Bank Payment Providers
Payment institutions, e-money institutions, money transfer operators, and open-banking providers all move money without being banks. This guide explains what each does, how they reach clearing, and why they carry the same anti-money-laundering duties as banks.
FedNow: instant settlement at the Federal Reserve
The Federal Reserve's FedNow Service settles each retail payment individually and irrevocably in central-bank money, around the clock, so the receiver can use the money in seconds — a real-time gross settlement rail that contrasts with batch, deferred-net ACH.
India's RTGS, NEFT and NACH
Beyond the instant UPI and IMPS rails, India runs RTGS for high-value gross settlement in the books of the Reserve Bank of India, NEFT for half-hourly net batches, and NACH for bulk recurring collections and disbursements.
Singapore's payment systems: MEPS+, FAST and PayNow
Singapore settles high-value payments gross in MAS's MEPS+, clears near-instant retail transfers through FAST with deferred-net settlement in MEPS+, and lets people address those FAST payments by a simple PayNow proxy instead of an account number.
Japan's BOJ-NET and the Zengin System
Japan settles large-value yen payments gross in the Bank of Japan's BOJ-NET, while the Zengin System clears domestic retail credit transfers and settles their net positions across accounts at the Bank of Japan — with large items diverted to BOJ-NET.
Brazil's Pix and STR
Brazil's Pix settles instant retail payments individually over the central bank's SPI, addressed by a simple Pix key, while the STR moves high-value interbank obligations gross in central-bank reserves — the retail-instant and wholesale-RTGS halves of the Banco Central do Brasil's system.
Mexico's SPEI
Banco de Mexico's SPEI processes payment orders individually and settles them in central-bank money within seconds, addressed by an 18-digit CLABE — a real-time gross settlement system that queues rather than overdraws when a bank is short of liquidity.
PAPSS: the Pan-African Payment and Settlement System
PAPSS lets a company pay for intra-African trade in its own local currency while the beneficiary receives theirs, routing the instruction through the two central banks and netting the day's cross-currency balances among them — reducing reliance on a hard-currency intermediary.
Buna: the Arab region's cross-border payment system
Buna, founded by the Arab Monetary Fund, settles cross-border payments across multiple regional and international currencies in central-bank money, with sanctions and financial-crime screening applied both before and after settlement — a multi-currency real-time gross settlement service for the Arab region and beyond.