Русско-англо-русский юридический словарь

A correspondent bank is a financial institution that provides services on behalf of another, equal or unequal, financial institution. It can facilitate wire transfers, conduct business transactions, accept deposits and gather documents on behalf of another financial institution. (Investopedia)

Correspondent and intermediary banks serve as third-party banks that coordinate with beneficiary banks to facilitate international fund transfers and transaction settlements. The differences between them are not consistent; depending on where you are from, correspondent banks are distinct from intermediary banks, or they can be a type of intermediary bank, indistinguishable from intermediary banks. (Investopedia)