A method and system for fallback to message compose on the calling party's own supervisory (messaging) system on a synchronous call attempt. In particular, where a calling party cannot have a synchronous call with a called party due to busy signal, no answer, reaching a called party's messaging system or the wrong person or other reasons, address information for the called party is retrieved, the call is dropped (disconnected or the call request is discontinued), and a message compose session is established for the calling party, with the called party's address information pre-filled (i.e. destination number, voice mail number, e-mail address, pager number, etc.). In this way, the calling party does not need to take any additional steps to compose a message or to determine the called party's address information or alternate address information and, further, can compose a message using the calling party's own message compose system.