A correspondent account is a deposit account that one bank holds at another bank so the account-holding bank can process payments, settle transactions, and provide financial services on the other’s behalf. It is the plumbing that lets a bank operate in a country where it has no branch of its own. When you send money overseas, or receive it, the funds almost certainly pass through one of these accounts along the way.
The Two Banks in Every Relationship
Every correspondent arrangement involves two institutions with defined roles. The correspondent bank holds the account and performs services in its home market, acting as a local agent with access to that country’s currency and payment systems. The respondent bank is the one that opens the account and uses those services to reach customers and markets it cannot serve directly.
Consider a mid-size bank in Latin America that needs to move U.S. dollars for its customers. Opening a 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 one of its customers pays 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 pushes the payment through the domestic system. From the customer’s side it looks like an ordinary transfer, but the interbank account underneath is what makes it possible.
Nostro and Vostro
The same account has different names on each bank’s books. The respondent bank calls it a nostro account, from the Latin for “ours,” because the money in it belongs to the respondent. The correspondent bank calls the same account a vostro account, meaning “yours,” because it is holding funds that belong to someone else.
The labels are bookkeeping shorthand. A U.S. bank’s dollar account at a London bank shows up as nostro on the U.S. bank’s ledger and vostro on the London bank’s. The distinction matters when the two banks reconcile balances across currencies and time zones and need to keep straight who owns the money and who is just holding it.
How an International Wire Actually Moves
Money sent across borders rarely travels in a straight line. If your bank and the recipient’s bank do not have a direct relationship, the payment hops through one or more intermediary correspondent banks. The instructions ride on the SWIFT network, a messaging system connecting more than 11,000 financial organizations across 200-plus countries that carries over 23 million payment messages daily.1SWIFT. Interbank Payments and Correspondent Banking
A typical transfer flows 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 pays the recipient’s bank directly or passes the instruction 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 relevant accounts until the money arrives.
Each intermediary in the chain typically charges a processing fee, which is why the amount the recipient receives can be noticeably less than what the sender transmitted. For consumer remittance transfers over $15, federal law requires providers to give you a written disclosure before you pay, showing the transfer amount, all fees charged by the provider, 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 That rule exists precisely because the correspondent chain can make final costs hard to predict.
What Else These Accounts Are Used For
Wires are the most visible use, but correspondent accounts support several other functions that keep cross-border commerce moving.
- Foreign exchange. The correspondent holds and manages balances in its local currency for the respondent and handles conversion when the respondent’s customers need to buy or sell that currency.
- Interbank settlement. When two banks need to close out a transaction between them, the correspondent account is the mechanism for actually transferring the funds.
- Check clearing. If a respondent’s customer deposits a check drawn on a foreign bank, the respondent routes it through its correspondent, which presents the check locally and credits the respondent when it collects.
- Cash and treasury management. Correspondent banks manage foreign cash positions and short-term investments for respondents that do not have their own trading desks abroad.
Without this arrangement, any bank that wanted to operate internationally would need its own branches and licenses in every country where its customers do business.
The U.S. Rules Around Foreign Correspondent Accounts
Correspondent accounts held for foreign banks are among the highest-risk products in banking from a regulatory standpoint. The U.S. correspondent processes transactions for a foreign bank’s customers without ever seeing them, which creates obvious opportunities for money laundering and sanctions evasion. Federal law addresses this through overlapping requirements under the Bank Secrecy Act, as amended by the USA PATRIOT Act.
Due Diligence
Any U.S. financial institution that opens or maintains a correspondent account for a foreign bank must run a due diligence program with policies and controls 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 minimum the bank has to assess the money laundering risk the foreign bank poses, 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 does not need to identify every customer of the foreign bank, but it does need to understand the foreign bank’s business, the markets it serves, and whether its own anti-money laundering controls are credible.5FFIEC BSA/AML InfoBase. Due Diligence Programs for Correspondent Accounts for Foreign Financial Institutions
Enhanced Due Diligence
Standard due diligence is the floor. When a foreign bank operates under an offshore banking license, or in a country designated as non-cooperative with international anti-money laundering standards, the U.S. bank must go further.3Office of the Law Revision Counsel. 31 U.S. Code 5318 – Compliance, Exemptions, and Summons Authority It must take reasonable steps to identify the owners of the foreign bank (if its shares are not publicly traded), conduct heightened scrutiny of activity, and determine whether the foreign bank itself provides correspondent services to other foreign banks.4FinCEN. Fact Sheet for Section 312 of the USA PATRIOT Act Final Regulation and Notice of Proposed Rulemaking
That last point addresses nesting, one of the trickiest risks in this space. If a foreign respondent lets a third foreign bank route payments through its correspondent account at a U.S. bank, the U.S. bank ends up processing transactions for an institution it never vetted. Enhanced due diligence forces the U.S. bank to ask about those downstream relationships.
Shell Bank Prohibition
U.S. law flatly prohibits banks from holding correspondent accounts for foreign shell banks, meaning foreign banks with no physical presence in any country. If a U.S. bank discovers that a respondent is a shell bank, it must 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 range from extra recordkeeping and reporting, to demanding identification of beneficial owners, to prohibiting any U.S. correspondent relationship with the target.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 is an outright ban that effectively cuts the target off from the U.S. dollar system.
De-Risking and Why Some Banks Are Walking Away
Regulatory pressure has produced a side effect known as de-risking. Rather than build out the compliance apparatus needed to keep high-risk correspondent relationships, many large banks have terminated them. The number of active correspondent banking relationships and payment corridors has fallen roughly 33% over the past two decades.
The banks doing the cutting are making a cold calculation. If a correspondent relationship with a small bank in a developing country generates modest fee income while carrying the risk of a nine-figure enforcement action, the math does not work. The small bank, meanwhile, may have no alternative. When its last correspondent relationship goes away, it can no longer process dollar payments, clear international checks, or offer basic cross-border services.
Ordinary people feel the effects. Small businesses lose access to international suppliers. Families sending remittances pay more or lose transfer options entirely. Caribbean nations and Pacific island states have been hit particularly hard, with some countries losing access to all major correspondent corridors. The Financial Action Task Force and other international bodies have acknowledged the tension between financial integrity and financial inclusion, but no consensus fix has emerged.
What Might Come Next
The delays, costs, and opacity of the correspondent model have drawn attention from central banks and technology developers. Project Agorá, led by the Bank for International Settlements together with seven central banks and more than 40 financial institutions, is testing whether tokenized versions of commercial bank deposits and central bank reserves could replace the sequential chain of correspondent transactions with simultaneous settlements that complete in full or not at all.7Bank for International Settlements. Project Agora: Exploring Tokenisation of Cross-Border Payments Its first phase is expected to wrap up in the first half of 2026.
Whether tokenized ledgers eventually displace the traditional correspondent account is an open question. The existing system handles trillions of dollars daily and is embedded deep in global banking infrastructure. For now, correspondent accounts remain the standard way money moves across borders, and the rules around them continue to grow.