A Singapore exporter receives a U.S.-dollar payment from a buyer overseas. Neither bank necessarily holds a direct account at the other institution. Instead, the money may travel through a correspondent banking relationship. The customer’s own bank says the payment was sent, but the exporting company’s ledger has not been credited. The real question becomes: which bank actually holds the funds, what did each intermediary do, and which account needs to be reconciled?
Correspondent banking services let a financial institution provide accounts and payment-related facilities to another bank, often to support cross-border clearing, cash management and international trade. The gold standard is an identifiable chain of bank responsibilities, reliable nostro and vostro books, clear message and fee information, risk-based due diligence and a payment outcome that can be traced to its proper recipient.
This article focuses on bank-to-bank infrastructure, not just the retail experience discussed in Cross-Border Remittances, currency conversion in Foreign Exchange Services or compliance alerts in Financial Sanctions Screening. It joins the Gold Standard management hub as a distinct interbank service.
Quick answer: one interbank balance, two perspectives
| Party and account view | What is recorded | Typical evidence |
|---|---|---|
| Respondent bank, nostro | Claim against correspondent | Internal GL and external statement |
| Correspondent bank, vostro | Deposit liability to respondent | Official account ledger |
| Customer payment | Separate payer and beneficiary obligations | Payment IDs and actual credits |
| Interbank message | Instruction and transaction detail | Message and status log |
Worked nostro reconciliation in U.S. dollars
| Illustrative entry | Change | Running balance |
|---|---|---|
| Opening | — | US$500,000 |
| Confirmed incoming credit | +US$120,000 | US$620,000 |
| Authorised outgoing payment | −US$70,000 | US$550,000 |
| Permitted correspondent charge | −US$50 | US$549,950 |
The example is fictional. The correspondent’s vostro view and respondent’s nostro accounting must reconcile to the true underlying position, including actual statement dates and outstanding items.
Sixteen bank-to-bank service decisions
1. Correspondent and respondent are legal roles, not customer nicknames
The respondent bank seeks banking facilities from a correspondent institution, often an account or access to a clearing currency and region it cannot directly reach. The correspondent supplies those facilities under a contractual and regulatory framework. End customers may not know how many separate banks help move their payment.
The BIS Committee on Payments and Market Infrastructures 2016 correspondent banking report describes these relationships and the challenges they face. The first operational task is identifying every bank’s legal name, account relationship and service boundaries. A bank’s role must not be inferred merely from a logo in a transaction status message.
2. Explain nostro and vostro from the correct perspective
A nostro account is commonly the account a bank holds with another bank, from the perspective of the bank owning the balance. The same account can be viewed as a vostro balance by the bank maintaining it on behalf of the respondent. The terminology describes perspectives on an interbank account, not two independent piles of money.
If Bank A holds US$500,000 with Bank B, Bank A records its claim as a nostro balance while Bank B records the corresponding customer-bank liability as a vostro account. Accounting treatment may have more detail under the actual framework. A strong service reconciles both perspectives without double counting a single financial position.
3. Map the payment route before quoting speed or fees
The payment may pass from the ordering bank through one correspondent, another intermediary and finally the beneficiary’s bank. The chain can differ by currency, destination, membership and agreed clearing route. A user-facing instruction that names the final beneficiary bank does not necessarily identify the bank actually moving the settlement funds.
Record permitted sender, recipient and intermediary information in the appropriate payment message. Define which route is authorised, where an interbank debit or credit takes place and which party receives any fees. The BIS report recommends improving payment messages and use of legal entity identifiers to increase transparency. A promise of instantaneous settlement should be made only when the actual rail supports it.
4. Make bank onboarding genuinely risk based
A correspondent relationship can expose a bank to financial-crime and regulatory risks arising from its respondent’s products, customers, geography and controls. A blanket exclusion of banks based only on country or business type can also push legitimate users away from formal payment channels.
The FATF correspondent banking guidance announcement stresses customer-by-customer risk assessment rather than indiscriminate de-risking. Verify ownership, licence, permitted activities, relevant supervision and control arrangements proportionately. A correspondent should understand its immediate respondent’s risk and service, not claim to know every ultimate retail customer without a lawful basis.
5. Treat nested and payable-through relationships explicitly
Some respondents use facilities to service additional institutions, while certain arrangements grant parties more direct operational use of a correspondent account. The resulting exposure can differ from a simple bank-to-bank account. A correspondent should understand the extent of downstream access without treating every nested relationship as inherently prohibited.
Establish actual use rights, expected transaction types and controls in the agreement. If further access changes the risk, apply appropriate additional due diligence and monitoring. The FATF’s risk-based guidance does not support automatic closure without considering specific facts. Document the parties and permissible services rather than hiding downstream users behind a general “banking clients” label.
6. Know what SWIFT messages do and what they do not do
A structured financial message can carry the payment instruction, beneficiary details, reference and information needed by financial institutions. Sending that message is not itself evidence the beneficiary’s account has been credited. Banks may use messaging networks alongside separate settlement and accounting infrastructures.
Maintain message identifiers and actual account statements independently. Validate structured originator and beneficiary fields and keep sensitive data within lawful processing. If a customer asks where a payment is, trace the sequence from instruction and bank acknowledgement through debit, settlement and final credit, not just a “SWIFT sent” screenshot.
7. Reconcile nostro balances with actual external statements
A respondent’s internal payment ledger may debit a nostro balance before its correspondent confirms the movement, or a correspondent may post an entry that the respondent has not yet classified. An uncorrected difference can distort liquidity and cause a later duplicate payment.
Maintain daily or appropriately frequent reconciliation of opening balance, confirmed credits, authorised debits, charges, reversals and closing external statement. Label items pending external confirmation separately. A suspense balance is not a permanent solution; aged breaks need documented ownership and investigation. The correct ending amount must match evidence from the actual account provider.
8. A simple correspondent account calculation should have no mystery difference
Imagine a fictional nostro ledger starting with US$500,000. It receives a confirmed US$120,000 credit, sends a US$70,000 payment, and incurs an authorised US$50 bank charge. The reconciled end balance is US$549,950. The other institution’s corresponding accounting treatment needs to agree on the underlying position.
If the respondent reports US$550,000, the US$50 unexplained difference must be classified and repaired, not erased as “minor rounding”. That same principle applies when entries are far larger and denominated in other currencies. The example is illustrative, not an actual correspondent fee or statement.
9. Separate foreign-exchange execution from interbank transmission
A Singapore bank can agree a currency conversion with its customer and also use a correspondent to pay out the foreign currency. The rate offered, the amount remitted, the nostro debit and final beneficiary credit are related but different transactions. A missing credit cannot be explained solely by the fact that the FX trade settled in the original bank.
Link the FX deal, payment amount, currency, charges and correspondent reference in the finance systems. Identify what is confirmed and what remains outstanding. A bank should never mistake the customer’s successful purchase of foreign currency for proof that the foreign supplier received it.
10. Show fee deductions and the commercial allocation of charges
Cross-border bank chains can involve sending, intermediary and receiving bank fees, depending on agreed terms and arrangements. Fee codes and customer expectations can differ by payment method and corridor. A customer might expect a supplier to receive the invoice amount but find a smaller credit after allowable deductions.
Give clear information about known fees, charge allocation and uncertainty before release, then explain what the actual counterparties deducted. Reconcile the original remitted amount with the known intermediary charges and final credit. The correspondent’s service should improve fee transparency rather than relying on opaque descriptions that conceal whose balance changed.
11. Sanctions compliance and correspondent monitoring have separate decisions
A payment can raise a potential sanctions-name match, a transaction-monitoring alert or an operational routing error. These are not the same legal or financial states. A legitimate payment may be delayed while information is reviewed, but false matches also require a proper route to authorised release.
Use the governing sanctions regime, applicable reporting duties and contractual controls. The CPMI report discusses KYC utilities, LEIs and information-sharing measures that can reduce friction while preserving risk controls. Keep investigation evidence and actual payment status independent so a compliance case cannot simply make customer funds disappear.
12. Funding and intraday liquidity need real account data
A correspondent bank may require a respondent to maintain a balance or meet funding conditions to send payments. Payments can fail because an account is underfunded even when the customer has enough money at its own bank. The interbank liquidity position and customer account balance are distinct.
Forecast expected outgoing payments, inbound funding, settlement cut-offs and agreed credit limits in each currency. Reconcile availability against confirmed nostro balances rather than uncollected incoming transfers. A bank should explain an operational funding hold accurately, without asserting the beneficiary has been paid merely because the respondent accepted the customer’s instruction.
13. Protect settlement finality and truthful customer status
The moment a payment is final depends on the actual bank, clearing and payment system rules. A sender’s correspondent may have debited funds before the receiving bank credits its customer. “Processed”, “settled”, and “credited” can therefore refer to different points in the chain.
Define each stage in internal and customer reporting, and retain authoritative evidence. Where a transfer is returned or rejected, preserve the reference and make a lawful correction. A final customer notification should reflect the actual available evidence; it must not claim universal irrevocability before the governing system reaches its final state.
14. Investigate missing payments across legal entities promptly
A transfer can be lost operationally because a beneficiary reference is incomplete, an intermediary bank cannot identify the recipient or a prior message was not properly matched. If each participant says its own process was successful, no single institution may accept responsibility for the end-to-end case.
Assign one respondent-bank case owner who can trace partner references and obtain appropriate information from correspondents. Reconcile every debit and credit, including any returned value. A customer’s repeated enquiries are not a substitute for a documented investigation. The service should establish whether the amount is pending, credited, returned or lawfully held.
15. A fictional export receipt shows what real reconciliation means
Imagine a Singapore exporter waiting for US$120,000. Its local bank expects an incoming credit through a correspondent, but the interbank record contains an incomplete beneficiary reference. The bank receives a consolidated credit while the customer’s own account remains unpaid. An automated “funds received” alert creates further confusion.
A sound process traces the correspondent credit, suspense entry and original beneficiary evidence, applies an authorised allocation and confirms the exporter’s bank credit. It also corrects the data-quality issue for later receipts. The example is fictional; the operational distinction is that a nostro credit is not automatically the final beneficiary’s credited balance.
16. The gold standard is interbank service that preserves customer access
Correspondent banking supports international trade and financial inclusion but can become expensive or fragile without trustworthy due diligence and strong ledgers. A service that terminates relationships indiscriminately may harm legitimate payment access; one that ignores material controls can expose the system to serious risk.
Measure unresolved nostro breaks, aged payment enquiries, routing errors, sanctions false matches, funding shortages and known fee discrepancies. Review actual transaction trails from respondent instruction to beneficiary credit. The gold standard is proportionate lawful access and reconciled settlement, not merely a growing volume of international messages.
Correspondent banking FAQs
Is a nostro account different money from a correspondent’s vostro account?
Usually they are perspectives on the same interbank account: the respondent’s asset and correspondent’s corresponding liability.
Does a SWIFT instruction prove the beneficiary was credited?
No. Messaging and final account credit are distinct stages.
Does FATF require banks to terminate every relationship with high-risk countries?
No. Its guidance emphasises appropriate risk-based assessment rather than indiscriminate de-risking.
Why can a bank have adequate customer deposits but an international transfer fail?
The relevant correspondent funding, settlement permissions or destination information can still be insufficient.
Who should investigate a missing foreign payment?
The bank handling the customer’s instruction should coordinate the relevant authorised tracing and reconciliation process.
Correspondent banking operational review
- Map contractual respondent, correspondent and downstream routing parties.
- Reconcile nostro assets with correspondent bank statements and internal ledgers.
- Document correspondent customer risk proportionately and review significant changes.
- Verify sender, receiver, LEI where appropriate and transaction references.
- Separate FX execution, interbank instruction, settlement and final beneficiary credit.
- Trace fees, unmatched credits, returns and authorised restrictions to closure.
- Monitor currency liquidity, service continuity and root causes of recurring breaks.
Official interbank sources and eduKate connections
- BIS CPMI: Correspondent Banking — Final Report, 2016.
- FATF: Risk-Based Correspondent Banking Guidance, 2016.
- BIS CPMI: Correspondent Banking Structures and Risk, Background.
- eduKate: Cross-Border Remittances.
- eduKate: Foreign Exchange Services.
- eduKate: Financial Sanctions Screening.
Educational interbank service analysis, not an individual compliance, payment finality or legal determination. Correspondent due diligence, payment routes and rights depend on applicable regimes and agreements.