As a box company we are working to acquire a SQF compliant facility. I have a question that I am stuck on about raw materials. Our consultant said it was best for us to receive a letter of guarantee when it comes to the raw material assessment. Now he said to ask every supplier if they where compliant with the fda regulation 21 cfr. Is this need from every supplier? If not what exactly should I ask of the suppliers to send us? We have received some letters about 85% of the suppliers say they do abide by this regulation.