You should review information about a supplier before buying raw materials from them and have a written procedure for approval. You should review a supplier’s food safety procedures, regulatory compliance, food safety history, and certifications in the approval procedure.
If a raw material poses a hazard and requires a Supply-Chain Preventive Control – for example, a supplier might guarantee that raw materials only are stored in clean, dry sacks to prevent mold growth – those controls should be reviewed before buying the product. You might ask a supplier before you buy from them to describe Preventive Controls they follow, then periodically check to ensure that they continue to follow those controls.
