[Freeswitch-users] sip simple delivery

Hi, i would like to find out how can i stop a sip simple from being delivered once it has been dealt with, i have a module that receives the event and decides whether to deliver it or not based on some criteria ($$), but it does not matter what the module does, after it has finished precessing the message, freeswitch still delivers it. i understand it does this by default, any advise would be appreciated. thanks!