This document discusses contributing to assessment validation by participating in assessment validation activities. It outlines that assessment validators can come from internal or external sources, including assessors, industry representatives, and technical experts. Their roles may include reviewing assessment tools and materials, providing feedback on candidates' experiences, and evaluating tools against assessment principles. The document lists materials commonly used in validation, such as units of competency, assessment strategies, completed assessment tools, and policies. It describes templates used to structure validation discussions around topics like how well tools address units and the acceptability of evidence. Participants are encouraged to identify a validation process to engage in and determine their role.