[otrs] notification to the owner

hi, is there a way to send a notification to the old owner of a ticket, when the ticket gets a new owner? this would be helpful, if e.g. a teamleader is changing the ownership of a ticket from agent A to agent B. agent B gets automatically a notification, that he is now the new owner of the ticket, but agent A don't get anything at this point. thanks a lot for your help. regards, patrick.