Definicija: a postal service which returns to the sender of a letter (usually registered; in the case of a parcel, it may be insured) a form or card signed by the recipient. This is evidence that the letter was received.

Definicija: poštna storitev, pri kateri naslovnik vročitev potrdi na posebnem obrazcu, ki se imenuje povratnica. Povratnica se pošiljatelju pošiljke pošlje kot navadno pismo.