This document is a guide detailing the invoicing requirements for suppliers working with Alcoa. It outlines the necessary criteria for invoice submission to ensure timely processing and payment. Key requirements include the submission of valid VAT invoices, the necessity for invoices to match the corresponding Alcoa purchase order, and the importance of providing accurate company and bank information. The guide specifies that invoices should not be stapled, must contain only one purchase order number, and should reflect the net price without showing discounts separately. Additionally, it emphasizes that invoices can only be issued after the delivery of goods or services, and it provides instructions on how to address invoices to the correct Alcoa legal entity. The document also mentions the payment schedule and the process for handling invoices that do not meet the outlined requirements, including potential delays in payment. Furthermore, it provides information on accessing invoice and payment status through Alcoa's online platform.