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The pilot project SIGRI (Sistema Integrato per la Gestione del Rischio Incendi) of the Italian Space Agency aims at developing an integrated system for the management of wildfires. The system provides satellite-based products capable of assisting in all phases of fire combat activities: forecast, detection, damage assessment, and recovery. The SIGRI goals were achieved by implementing consolidated methodologies, and/or developing innovative tools and methods for the automated analysis of multispectral, Synthetic Aperture Radar, and non-EO data. This paper focuses on the testing and validation of algorithms developed during the final phase of SIGRI. The validation of the products generated is an important phase in which their potential is assessed, and algorithms are calibrated. We discuss the results of the validation process of the main chain of unsupervised products: Modified Fire Probability Index by multispectral moderate resolution data (prevention), early detection of fire Hot Spots by multispectral very-high temporal resolution data (response), and identification and mapping of Burn Scars (damage assessment) by high-spatial resolution electro-optical and Synthetic Aperture Radar data.