This guide outlines the Sender Certification Requirements necessary for businesses to achieve and maintain Certified sender status within the Validity Sender Certification program. The document details the processes involved in becoming Certified, including the completion of a Sender Certification questionnaire, which initiates an email program audit. It emphasizes the importance of adhering to industry standards and best practices across various aspects such as business model transparency, email measurability, infrastructure management, and compliance with legal regulations. The guide also describes the responsibilities of customers during the certification process, including the need for continuous compliance to retain certification status. Key sections address specific requirements related to business registration, website validity, email content, consent, privacy policies, and security measures. Additionally, it highlights the significance of maintaining measurable email volumes and outlines the consequences of failing to meet these requirements. Overall, the document serves as a comprehensive resource for organizations seeking to enhance their email deliverability and sender reputation.