Poste restante

[Agnes]

a system in which a post office keeps someones post until it can be collected, usually used by people who are travelling

[Luis Fok]

(of post) intended to be kept in a poste restante until it can be collected:

[Sommer]

the part of a post office that handles mail for persons who call for it

[mehmood]

a notation written on mail that is to be held at the post office until called for (not in the United States or Canada)

[Couch Potatoe]

A postal service in which mail is held at a post office to be collected by the recipient

[DanielDiems]

Poste restante (French pronunciation: ​[pɔst ʁɛstɑ̃t], remainder post), also known as general delivery in North American English, is a service where the post office holds the mail until the recipient calls for it. It is a common destination for mail for people who are visiting a particular location and have no need, or no way, of having mail delivered directly to their place of residence at that time.