English version

registered post in Mail topic

From Longman Dictionary of Contemporary Englishregistered postˌregistered ˈpost noun [uncountable]  British EnglishTCM a way of insuring something that you send by post in case it gets lost or damaged syn certified mail American English
Examples from the Corpus
registered postOne copy, by registered post to the University Press, a second deposited in the bank vaults for safekeeping.Her Confidential File etc. has been sent via registered post.