This document is a deliverable of the SCORE project, funded under the European Union’s Horizon 2020 research and innovation programme under grant agreement No 101003534. The Deliverable 3.12, entitled "User Documentation for Testing Tools and Data", is the twelfth report of Work Package 3 "Regional and Local Projections, Analyses, Modelling and Uncertainties", corresponding to Task 3.6 "Testing". The aim of this report is to provide documentation for testing tools and data as a detailed and essential guide for the effective application, validation, and operational use of the models and tools developed in WP3 tasks. This technical document is primarily designed to assist researchers, technical staff, and stakeholders from CCLLs, in validating the developed frameworks, tools and models tailored for flood hazard assessment, extreme event modelling, and long-term coastal dynamics. Additionally, it focuses on testing the applicability and reliability of developed tools in the context of various coastal settings within the CCLLs.