I've taken this content directly from KB10970; which shows you the log lines created during a success use of the Erase Data and Disable Handheld command.

You'll find this information in the BlackBerry Policy Service (POLC) log:

[40000] (07/17 17:50:27):{0xB80} {testuser1@port3101.org, PIN=FFFFFFFF, UserId=1}SCS::PollDBQueueNewRequests - Queuing KILL_DEVICE_REQUEST request
[30000] (07/17 17:50:51):{0xB78} {testuser1@port3101.org, PIN=FFFFFFFF, UserId=1}RequestHandler::...