Hi, where has the opinion come from? The issues over material certifications are wide and varied.
What material is the component made from? If it's perishable, or subject to material changes due to temperature, humidity, storage etc. then you need to discuss with your supplier as to what material specifications underlie the material itself, and if the material has a shelf life.
For example, a coil of steel could be used to make many small batches of the same component over a vast period of time.
Remember that if annual revalidation is required, you could be having the same material certificate for years to come.