( in Britain ) a special service provided by the Post Office that allows people to post letters without a stamp to a company or organization by using ‘Freepost’ in the address. The company that receives the letter pays the cost.
FREEPOST
Meaning of FREEPOST in English
Oxford guide to British and American culture English vocabulary. Руководство по британской и американской культуре, Оксфордский английский словарь. 2005