This document is a guide for the ATI Supplier Onboarding process, detailing the necessary information and forms required for suppliers to establish an account with ATI. It outlines various types of suppliers and the corresponding onboarding forms, including a Certificate of Insurance and a Services Agreement. The checklist specifies the required attachments, such as W-9 and W-8BEN forms, depending on whether the supplier is based in the United States or not. Additionally, the document includes supplier requirements, emphasizing the need for compliance with ATI's Supplier Expectations and Supply Chain Policies. It also highlights the necessity for suppliers to understand ATI's Corporate Guidelines for Business Conduct and Ethics. The onboarding process is contingent upon the submission of complete and accurate information, as well as adherence to ATI's payment terms and conditions. Furthermore, the document addresses insurance compliance and the minimum insurance requirements that suppliers must meet to proceed with the onboarding.