A correspondent account is a deposit account that one bank holds at another bank, letting the account holder process payments, settle transactions, and offer financial services through the other bank’s local infrastructure. It’s the plumbing that lets a bank in one country move money in a country where it has no branches of its own. Most international wires you send, most cross-border checks that clear, and most foreign-currency payments a business initiates ride through one of these accounts at some point.
The Two Banks in the Relationship
Every correspondent account involves two institutions with distinct roles. The correspondent bank is the one holding the account and doing the work in its home market. It acts as a local agent: handling transactions in its own currency, tapping its own connections to domestic payment systems, and executing instructions on behalf of its partner. The respondent bank is the one that opens the account and relies on the correspondent to reach customers and markets it can’t serve directly.
Think about a mid-size bank in Latin America that needs to process U.S. dollar payments for its customers. Opening a physical branch in New York would cost millions in licensing, staffing, and compliance. Instead, that bank opens a correspondent account at a large U.S. bank. When a customer needs to send dollars to a supplier in Chicago, the Latin American bank instructs the U.S. correspondent to move the funds. The correspondent debits the respondent’s account and routes the payment through the U.S. domestic system. The customer sees a normal international transfer. Underneath, it’s running through this interbank account.
Nostro, Vostro, and Loro
The same account carries different names depending on whose books you’re looking at. The respondent bank calls it a Nostro account, from the Latin for “ours,” because the money in it belongs to the respondent even though it’s parked abroad. The correspondent bank labels the same account Vostro, meaning “yours,” because those funds belong to the other institution. A third bank talking about the relationship between the other two would call it a Loro account, meaning “theirs.”
These labels are internal bookkeeping. A U.S. bank’s dollar account at a London bank shows up as a Nostro entry on the U.S. bank’s ledger and a Vostro entry on the London bank’s ledger. The naming keeps things straight when both institutions are reconciling the same pool of money across currencies and time zones.
How Money Moves Through a Correspondent Account
An international wire rarely travels in a straight line from your bank to the recipient’s. If your bank and the destination bank don’t have a direct relationship, the payment hops through one or more intermediary correspondents. The instructions travel on the SWIFT network, a messaging system that connects more than 11,000 financial organizations across 200-plus countries and carries over 23 million payment messages daily.1SWIFT. Interbank Payments and Correspondent Banking
A typical flow looks like this. Your bank sends a standardized SWIFT message to its correspondent, identifying the recipient, the destination bank, and the amount. The correspondent debits your bank’s Vostro account and either forwards the payment to the recipient’s bank directly or passes the instruction along to another intermediary that has a relationship with the recipient’s bank. Each institution in the chain processes the instruction and moves funds between the accounts it controls until the money arrives.
Each bank in the chain typically charges a processing fee, which is why the amount arriving at the other end can be noticeably less than what was sent. For consumer remittance transfers over $15, federal law requires the provider to give you a written disclosure before you pay, showing the transfer amount, the provider’s fees, the exchange rate, any third-party fees the provider can estimate, and the total amount the recipient will receive.2Consumer Financial Protection Bureau. 12 CFR 1005.31 Disclosures
What Else These Accounts Do
Moving wire payments is the most visible function, but the same account supports several other services that keep cross-border banking running.
Foreign exchange. The correspondent holds and manages balances in its local currency for the respondent. When the respondent’s customers need to buy or sell foreign currency, the correspondent handles the conversion using its access to local markets.
Interbank settlement. When two banks need to finalize a transaction between them, the correspondent account is the mechanism. One bank’s account gets debited, the other’s gets credited, and the exchange is complete.
Check clearing. If a respondent’s customer deposits a check drawn on a foreign bank, the respondent routes the check through its correspondent for collection. The correspondent presents the check locally, collects the funds, and credits the respondent’s account.
Cash and treasury management. Correspondent banks manage foreign cash positions and short-term investments for their partners, letting smaller banks participate in foreign money markets without building trading desks abroad.
Without these services, any bank that wanted to operate internationally would need its own branches and licenses in every country it touched. Correspondent banking removes that cost for almost every financial institution in the world.
Why U.S. Correspondent Accounts Are Heavily Regulated
Correspondent accounts held by U.S. banks for foreign banks carry some of the most stringent obligations in banking. The reason is structural. A U.S. correspondent processes transactions on behalf of a foreign bank’s customers without ever seeing those customers, which creates real openings for money laundering and sanctions evasion. The Bank Secrecy Act, as amended by the USA PATRIOT Act, addresses that risk in several ways.
Due Diligence on the Foreign Bank
A U.S. financial institution that opens or maintains a correspondent account for a foreign bank must set up a due diligence program with policies designed to detect and report suspected money laundering.3Office of the Law Revision Counsel. 31 U.S. Code 5318 – Compliance, Exemptions, and Summons Authority At a minimum, the bank has to assess the foreign bank’s money laundering risk, decide whether the account needs enhanced scrutiny, and review account activity periodically.4FinCEN. Fact Sheet for Section 312 of the USA PATRIOT Act Final Regulation and Notice of Proposed Rulemaking
The U.S. bank doesn’t have to identify every individual customer of the foreign bank. It does have to understand the foreign bank’s business model, the markets it serves, and whether its own anti-money laundering controls are credible. If those controls look weak, the U.S. bank is expected to either walk away or impose additional monitoring.5FFIEC BSA/AML InfoBase. Due Diligence Programs for Correspondent Accounts for Foreign Financial Institutions
Enhanced Due Diligence and the Nesting Problem
Standard due diligence is the floor. When a foreign bank operates under an offshore banking license, or is chartered in a country that’s been flagged as non-cooperative with international anti-money laundering standards, U.S. law requires enhanced due diligence.3Office of the Law Revision Counsel. 31 U.S. Code 5318 – Compliance, Exemptions, and Summons Authority That means taking reasonable steps to identify the foreign bank’s owners (if its shares aren’t publicly traded), scrutinizing account activity more closely, and figuring out whether the foreign bank itself provides correspondent services to yet other foreign banks.4FinCEN. Fact Sheet for Section 312 of the USA PATRIOT Act Final Regulation and Notice of Proposed Rulemaking
That last piece is the nesting problem. If a foreign bank opens a correspondent account at a U.S. bank and then lets a third foreign bank route transactions through it, the U.S. bank may be processing payments for an institution it has never vetted. Enhanced due diligence forces the question about those downstream relationships.
Shell Banks Are Off Limits
U.S. law flatly prohibits banks from maintaining correspondent accounts for foreign shell banks. A shell bank is a foreign bank with no physical presence in any country. These exist only on paper, often in low-oversight jurisdictions, and have a long history as vehicles for laundering proceeds. If a U.S. bank discovers a respondent is a shell bank, it has to close the account.
Special Measures
When the Secretary of the Treasury identifies a foreign jurisdiction, institution, or class of transactions as a primary money laundering concern, the government can impose escalating “special measures” on correspondent accounts tied to the threat. These run from extra recordkeeping and reporting on specific transactions, to demanding identification of beneficial owners, to prohibiting U.S. banks from holding any correspondent relationship with the target at all.6Office of the Law Revision Counsel. 31 U.S. Code 5318A – Special Measures for Jurisdictions, Financial Institutions, or International Transactions of Primary Money Laundering Concern The fifth and most severe measure effectively cuts the targeted institution or country off from the U.S. dollar system.
What Failure Costs
The penalties for getting this wrong can be existential. In 2014, BNP Paribas agreed to plead guilty and pay $8.97 billion for processing transactions through the U.S. financial system on behalf of entities in sanctioned countries, along with a one-year suspension of dollar-clearing operations for the business lines involved.7U.S. Department of Justice. BNP Paribas Agrees to Plead Guilty and to Pay $8.9 Billion for Illegally Processing Financial Transactions The case involved stripping identifying information from payment messages to hide the sanctioned origin of funds moving through U.S. correspondent accounts. Several other global banks have paid settlements ranging from hundreds of millions to billions for similar failures.
The De-Risking Side Effect
Regulatory pressure has produced a consequence regulators did not intend: de-risking. Rather than invest in the compliance infrastructure needed to manage high-risk correspondent relationships, many large banks have simply ended them. The number of active correspondent banking relationships and payment corridors has fallen roughly 33% over the past two decades.
The math from the large bank’s side is straightforward. If a correspondent relationship with a small bank in a developing country generates modest fee income but carries the risk of a nine-figure enforcement action, the relationship isn’t worth keeping. So the account gets closed. The small bank often has no ready alternative. When its last correspondent relationship disappears, it loses the ability to process dollar payments, clear international checks, and offer basic cross-border services.
The effects reach ordinary people. Small businesses lose access to international suppliers. Families sending remittances face higher costs or lose transfer options entirely. Caribbean nations and Pacific island states have been hit especially hard, with some losing access to all major correspondent banking corridors. The Financial Action Task Force and other international bodies have acknowledged the tension between financial integrity and financial inclusion, but no shared fix has emerged.