correspondent
noun [ C ]
uk/ˌkɒrɪˈspɒndənt/ us COMMUNICATIONS
a person who writes a letter or email:
an email correspondent
a person who works for a newspaper, television station, etc. and whose job is to report on a particular subject or from another country:
business/labour/legal, etc. correspondent Our guest is financial correspondent at the New York Times.
BANKING
a correspondent bank