Aemtek is an ISO accredited, reputable laboratory with over 15 years of experience testing for the food, environmental, and cosmetic industries. Although it cannot be guaranteed that Amazon will accept any individual COA, we are familiar with their documentation requirements and have put together a panel of tests that includes the analyses retailers will look for on a Certificate of Analysis (COA) to ensure product safety and quality. If you do have any issues with your COA, please reach out to us at labdata@aemtek.com and we will work with you to address the issue.