SER, SER-Europe, and WWF Spain revised the standards for certifying Mediterranean Forest Restoration projects in Spain. This update includes practical guidelines and tools, developed and tested with the support of the Audemars-Watkins Foundation over the past three years. SER and WWF have collaborated to integrate their standards systems, resulting in the publication of version 3.0 in January 2022, and the updated version 4.0 in November 2023. This new version includes additional sections and annexes, providing a comprehensive guide for forest restoration in the Mediterranean region.