poste restante
/ˈpəʊstrɪˈstænt/noun
1- Brit. a service whereby mail is kept at a specified post office until collected by the addressee〈英〉存局候领（一项邮政服务）。
1.1
- the department in a post office keeping such letters（邮局的）存局候领处。
词源
mid 18th cent.: from French, literally 'mail remaining'.