isr.co.ro : glossary bcc (blind courtesy copy/blind carbon copy) A copy of an e-mail message sent to an additional recipient but not included on the list of recipients seen by the primary addressees. You might send yourself such a copy for your files or send one to your boss, which is why they're sometimes known as cover copies. As with paper messaging, the bcc version of the name is remarkably resistant to change, even though many message originators haven't ever even seen a full-size sheet of carbon paper.