Never trust postmen!
My late uncle Jack was one and he was as crooked as hell, the police found heaps of undelivered mail at his home and he was lucky to get off with only a fine and not jail..
Another untrustworthy lazy lying postman round here can't be bothered delivering parcels on his rounds, so he pushes a card through peoples doors saying- "You were out when I called: please pick up the package yourself from the local sorting office"
Needless to say, they WERE in when he called but the bastard never bothered to ring the doorbell!