This white paper discusses Yoti's facial age estimation technology, which accurately determines a person's age from an image of their face without requiring physical document checks or human intervention. The technology adheres to GDPR principles, emphasizing privacy by design and data minimization. It is noted for its high accuracy rates, with a True Positive Rate (TPR) of 99.3% for individuals aged 13 to 17 and 99.0% for those aged 6 to 12. The paper outlines the ethical considerations in developing the technology, including the collection of training data in compliance with GDPR guidelines. The facial age estimation service is designed to be secure and effective, providing age checks for businesses offering age-restricted goods and services. It is also highlighted that the technology minimizes bias across gender and skin tone, ensuring equality in performance. The paper includes information on the accuracy improvements over time and the potential applications in various settings, including retail and online platforms.