Poste restante--From Wikipedia, the free encyclopedia
http://en.wikipedia.org/wiki/Poste_restante
Poste restante (French word, meaning post which remains) is a service where the post office holds mail until the recipient calls for it. It is a common destination for mail for people visiting a particular location and have no need, or no way, of having mail delivered directly to their place of residence at that time.
United Kingdom