Wondering what is a Certificate of Conformity (CoC)? This is sometimes also called as Certificate of Conformance or Certificate of Compliance.
Some manufacturers and independent laboratories usually issue this certificate to buyers of products/components that are critical or high risk. A CoC mainly states that the product:
In some countries, CoC is a mandatory document along with the product. Also, when doing an international shipment, you must expect that a country's customs might request for a CoC for some critical and high risk products. Definitely, transporting safe and quality products are important to public safety especially users of a certain product.
Reference:
"What Is a Certificate of Conformity (COC), and How To Get One?,"QualityInspection.Org, accessed June 27, 2020, https://qualityinspection.org/what-is-certificate-of-conformity-coc/