Hi Inverse ,
As your co packers are BRC certified , and as you stated that the final product is yours , you have just to assure that the HACCP studies are integrated through the cycle , and there is no gaps , for example you will do yours , then the product go to co packer A , then B then C ,.. you follow up to make sure each step is covered in the scope of the BRC certificates ( which means the scope of their HACCP ) including transportation.But you do not have to create it as it will be duplication.
AS far they are BRC certified and your internal Supplier approval recognized that , this is OK .
Some internal supplier approval systems requires further validation , like questionnaire or copy for review /approve from HACCP or QAP , so you have to follow your own .
EhabGo to the full post