Correspondent Banking
Correspondent banking is an arrangement in which one bank (the respondent) maintains a deposit account with another bank (the correspondent) in a foreign country, enabling cross-border payments, currency exchange, and trade finance services for clients who lack a direct banking presence in that market.
Correspondent banking is the infrastructure that allows international financial flows to occur even when the sending and receiving banks have no direct relationship. When a bank in Vietnam wants to send a dollar payment to a bank in Peru, neither institution likely has a direct account with the other. Instead, both maintain accounts with large international correspondent banks — typically major U.S. or European institutions such as JPMorgan Chase, Citibank, Deutsche Bank, or HSBC. The payment flows through the network of correspondent accounts, with each intermediary debiting and crediting its accounts accordingly.
The nostro and vostro terminology describes the correspondent relationship from each party's perspective. From the Vietnamese bank's perspective, its dollar account held at the U.S. correspondent is a nostro account (Italian for 'our account'). From the U.S. correspondent's perspective, the account it holds on behalf of the Vietnamese bank is a vostro account (Italian for 'your account'). These paired accounts are the plumbing through which cross-border dollar flows move.
Correspondent banking is central to trade finance. Letters of credit, documentary collections, and bank guarantees all rely on the trusted relationships and account networks that correspondent banks provide. SWIFT's network of standardized messages makes correspondent banking operationally efficient by standardizing payment instructions across thousands of institutions.
However, correspondent banking has faced significant pressure from AML and sanctions compliance obligations. Since the 2010s, major U.S. and European banks have engaged in de-risking — terminating correspondent relationships with banks in higher-risk jurisdictions that present elevated AML compliance exposure. This de-risking has reduced access to financial services in parts of the Caribbean, Africa, and Central Asia, raising concerns at the World Bank and G20 about financial exclusion.
For U.S. regulators including FinCEN and the OCC, correspondent accounts held by foreign banks are a known vulnerability for money laundering, and U.S. correspondents face strict due diligence obligations under the USA PATRIOT Act before opening or maintaining such accounts.