URgeNT--EXpired MEdicines-how to destroy & verify

hello..im on audit of a pharmeceutical company..

 tell me what is the procedure to get the expired medicines physically destroyed.. & then how to verify thesame.

if there should be any document to verify the same.. & if yes,

whether it should contain..date,timings, persons present, mode of destroying, place..etc..

 please explain me in detail..

kind regards--

abhiram