Payments - Introduction / Learning brief
Buna: the Arab region's cross-border payment system
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In simple terms / 01
What this means in plain language
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.
Complete lesson / 02
Understand the full idea, step by step
A business in one Arab country wants to pay a supplier in another — quickly, in a currency both sides trust, with the money truly final once it lands. For years a payment like that would hop through a chain of correspondent banks abroad, gathering delay and fees on the way. Buna was built to shorten that trip: a shared regional system where two banks in different countries can settle a cross-border payment directly, in central-bank money, without leaving the region to do it.
Buna at a glance
- What it is
- A cross-border, multi-currency regional payment system
- Founded by
- The Arab Monetary Fund (AMF)
- Operated by
- The Arab Regional Payments Clearing and Settlement Organization (ARPCSO)
- Settlement model
- Real-time gross settlement in central-bank money
- Operating rhythm
- Six days a week across supported regional and international currencies
- Compliance
- AML, counter-terrorism-financing and sanctions screening before and after settlement
A regional rail, settling gross in central-bank money
Buna is a cross-border payment system founded by the Arab Monetary Fund and operated by the Arab Regional Payments Clearing and Settlement Organization. Its job is to let banks across the Arab region — and their correspondents further afield — send payments to one another in several supported currencies without stitching together a fresh correspondent chain each time. Settlement happens in central-bank money: the final entries are claims on a central bank, not IOUs between commercial banks, which is what makes a settled Buna payment safe to rely on. It runs six days a week, so the regional payment day is not tied to any single country's calendar.
Real-time gross settlement (RTGS) — each payment settles individually and in full, the moment it is ready
Buna is a real-time gross settlement system. "Gross" means each accepted payment settles on its own, for its full amount — Bank Alfa's Buna account is debited and Nordbank's credited one payment at a time, not batched and offset against others. "Real-time" means it happens the moment the payment is ready and cleared to proceed, not at the end of a cycle. The trade-off is funding: a sending bank must have the value available for each payment as it goes, because nothing is netted down first. In return, every settled payment is final on its own, immediately.
You may be wondering: if screening runs before the payment settles, does every payment sit and wait for a human to look at it?
No. The great majority of payments pass screening automatically and settle without anyone touching them — the check compares the parties against watchlists in the moment and clears them if nothing matches. A payment only stops when a name throws a possible match. Then, and only then, the payment is held so a compliance analyst can look. Screening is a filter that lets the clean flow through and pulls aside the few that need a second pair of eyes.
How Asha Traders' payment moves through Buna
- MESSAGE
Bank Alfa submits the cross-border payment to Buna in one supported currency — here USD 25,000.00. The message asks for value to move; it does not carry the money itself.
- VALIDATION
Before anything settles, Buna screens the payment for AML, counter-terrorism-financing and sanctions concerns, comparing the parties against watchlists. This is a defensive control: a possible match is held and reviewed, not settled first.
- SETTLEMENT
With screening clear, Buna settles the payment individually and in real time: it debits Bank Alfa's USD Buna account and credits Nordbank's, in central-bank money. There is no netting and no waiting for a cycle.
- VALIDATION
Buna also screens and monitors after settlement — a second defensive pass that can surface patterns a single earlier check might miss, feeding any later investigation.
- MESSAGE
Buna delivers the payment details to Nordbank, the beneficiary bank, now that settlement is final across the Buna accounts.
- LEDGER
Because the interbank leg has settled with finality, Nordbank posts the USD 25,000.00 credit to the supplier's account without waiting on anything else.
Read the steps as text
- 01MessageBank Alfa submits the cross-border payment to BunaBank Alfa (originator bank) → Buna (ARPCSO / Arab Monetary Fund) · Payment instruction
Asha Traders is paying a supplier in another Arab country. Bank Alfa, a Buna participant, sends the cross-border payment to Buna in one supported currency — here US dollars. The message asks for value to move; it does not carry the money itself.
- 02ProcessingBuna screens the payment before settlementBuna (ARPCSO / Arab Monetary Fund)
Before any money moves, Buna runs anti-money-laundering, counter-terrorism-financing and sanctions screening as a defensive control — comparing the parties against watchlists to catch a possible match before it can settle.
Screening checkpoint: Pre-settlement AML/CTF and sanctions screening — Screening runs before settlement so a possible match can be held and reviewed rather than settled first. A hit is a flag for a person to check, not an automatic block.
- 03SettlementBuna settles the payment in real timeBuna (ARPCSO / Arab Monetary Fund) → Settlement agent (Buna accounts)
Buna is a real-time gross settlement system: it settles this payment individually the moment it is ready, debiting Bank Alfa's Buna settlement account and crediting Nordbank's, in the payment's own currency. No netting and no waiting for a cycle.
- DR Bank Alfa's USD settlement account at Buna — USD 25,000.00
- CR Nordbank's USD settlement account at Buna — USD 25,000.00
- 04ProcessingBuna monitors the settled paymentBuna (ARPCSO / Arab Monetary Fund)
Buna also screens and monitors after settlement — a second defensive pass that can surface patterns a single pre-settlement check might miss and feed later investigation. Screening applies both before and after the money moves.
Screening checkpoint: Post-settlement screening and monitoring — Monitoring settled payments is defensive: it looks for possible matches and unusual patterns after the fact, so a concern found late can still be investigated and reported.
- 05MessageBuna delivers the payment to NordbankBuna (ARPCSO / Arab Monetary Fund) → Nordbank (beneficiary bank) · Payment delivery
With settlement complete and final across the Buna accounts, Buna passes the payment details to Nordbank, the beneficiary bank, so it knows the funds are theirs and whom to pay.
- 06PostingNordbank credits the supplierNordbank (beneficiary bank)
Because the interbank leg already settled with finality on the Buna accounts, Nordbank can post the credit to the supplier's account without waiting on anything else.
- CR Supplier's account at Nordbank — USD 25,000.00
A held payment that turned out to be clean
Screening runs before settlement for a reason: it is better to hold a possible match for a moment than to settle a payment that should have been checked. Suppose the beneficiary's name on Asha Traders' payment resembled a name on a sanctions list. Buna's pre-settlement screening would raise an alert, and the payment would wait rather than settle. A compliance analyst then compares secondary identifiers — full name, date of birth, country — against the listed person. When the details do not line up, the alert is a false positive: the analyst records the evidence and the decision for audit, and the payment is released to settle in real time, later than planned but just as final. Buna then screens and monitors the settled payment again, so a concern that only shows up as a pattern can still be investigated and reported.
COMMON CONFUSION
“The payment message and the screening step are where the money actually moves between the banks.”
The message only carries instructions and, later, a delivery notice — it never carries the money. The money moves in exactly one place: the settlement step, where Buna debits one bank's central-bank-money account and credits the other's. Screening decides whether that settlement is allowed to happen; it does not move value itself.
STRICTLY SPEAKING
Strictly speaking, this lesson draws one payment in one currency with fictional banks, and shows screening as a single before-and-after pair. Real Buna operation spans several supported regional and international currencies, six-days-a-week operating windows with their own cut-off times, and layered compliance controls — many lists, tuned matching thresholds and formal case management — across many participants. The durable shape is what matters here: a regional RTGS settling cross-border payments individually in central-bank money, with defensive screening on both sides of settlement.
FOR NOW, REMEMBER
- Buna is a cross-border, multi-currency regional payment system founded by the Arab Monetary Fund and operated by ARPCSO.
- It is a real-time gross settlement system: each cross-border payment settles individually, in full, in central-bank money, six days a week.
- AML, counter-terrorism-financing and sanctions screening run both before and after settlement as defensive controls.
- A possible match is held for an analyst to review; a cleared false positive is then settled and delivered, with the evidence retained for audit.
TRY IT YOURSELF
Bank Alfa's USD 25,000.00 payment to Nordbank is held by Buna's pre-settlement screening because the beneficiary name resembles one on a sanctions list. A compliance analyst compares the full name, date of birth and country, finds they do not match the listed person, and clears the alert. What happens next, and why was the check placed before settlement?
Buna is one regional answer to a bigger question: how does a payment cross a border at all when the two banks do not share a country's system? That is the story of cross-border networks and the correspondent chains they replace.
KEEP GOINGKey takeaways / 03
Three things to remember
- 01
Identify who instructs, processes, clears, settles, and ultimately receives the funds.
- 02
Keep the exchange of payment information separate from the movement of money.
- 03
Trace where validation, accounting, charges, and exceptions enter the journey.
Operational sequence / 06
Follow the message and decision path
This compact sequence is a learning model. Exact routing and rulebook behavior can vary by scheme, participant, and implementation.
Read the steps as text
- 01MessageBank Alfa submits the cross-border payment to BunaBank Alfa (originator bank) → Buna (ARPCSO / Arab Monetary Fund) · Payment instruction
Asha Traders is paying a supplier in another Arab country. Bank Alfa, a Buna participant, sends the cross-border payment to Buna in one supported currency — here US dollars. The message asks for value to move; it does not carry the money itself.
- 02ProcessingBuna screens the payment before settlementBuna (ARPCSO / Arab Monetary Fund)
Before any money moves, Buna runs anti-money-laundering, counter-terrorism-financing and sanctions screening as a defensive control — comparing the parties against watchlists to catch a possible match before it can settle.
Screening checkpoint: Pre-settlement AML/CTF and sanctions screening — Screening runs before settlement so a possible match can be held and reviewed rather than settled first. A hit is a flag for a person to check, not an automatic block.
- 03SettlementBuna settles the payment in real timeBuna (ARPCSO / Arab Monetary Fund) → Settlement agent (Buna accounts)
Buna is a real-time gross settlement system: it settles this payment individually the moment it is ready, debiting Bank Alfa's Buna settlement account and crediting Nordbank's, in the payment's own currency. No netting and no waiting for a cycle.
- DR Bank Alfa's USD settlement account at Buna — USD 25,000.00
- CR Nordbank's USD settlement account at Buna — USD 25,000.00
- 04ProcessingBuna monitors the settled paymentBuna (ARPCSO / Arab Monetary Fund)
Buna also screens and monitors after settlement — a second defensive pass that can surface patterns a single pre-settlement check might miss and feed later investigation. Screening applies both before and after the money moves.
Screening checkpoint: Post-settlement screening and monitoring — Monitoring settled payments is defensive: it looks for possible matches and unusual patterns after the fact, so a concern found late can still be investigated and reported.
- 05MessageBuna delivers the payment to NordbankBuna (ARPCSO / Arab Monetary Fund) → Nordbank (beneficiary bank) · Payment delivery
With settlement complete and final across the Buna accounts, Buna passes the payment details to Nordbank, the beneficiary bank, so it knows the funds are theirs and whom to pay.
- 06PostingNordbank credits the supplierNordbank (beneficiary bank)
Because the interbank leg already settled with finality on the Buna accounts, Nordbank can post the credit to the supplier's account without waiting on anything else.
- CR Supplier's account at Nordbank — USD 25,000.00
Evidence & review / 07
Evidence & review
Buna, cross-border in the Arab region and beyond (Arab Monetary Fund / ARPCSO); the multi-currency-RTGS-with-embedded-screening pattern generalises to other regional systems. Screening content is defensive by design.
What this brief simplifies: The Buna participant onboarding and the exact screening tuning are summarised; the supported-currency set is described qualitatively and the flow shows a single currency.
Sources for this brief3
- Official requirement
Buna ↗ — Arab Monetary Fund / Arab Regional Payments Clearing and Settlement Organization · Buna: multi-currency RTGS operated by the Arab Regional Payments Clearing and Settlement Organization; screening before and after settlement
Buna settles cross-border multi-currency payments in central bank money via participants settlement accounts, with compliance screening integrated around settlement.
- Market practice
Wolfsberg Group Sanctions Screening Guidance ↗ — The Wolfsberg Group · screening controls applied around settlement
Wolfsberg guidance is industry market practice, not law; institutions vary in how they apply it.
- Simplified educational illustration
Payments Signal editorial teaching models — Payments Signal
Used wherever diagrams, scenarios, figures, or example values are didactic constructions rather than sourced facts; every such use carries a simplifications disclosure. All people, companies, banks, and list entries in examples are fictional.