This white paper discusses the Yoti MyFace liveness detection technology, which aims to mitigate spoofing attacks in biometric authentication. It outlines the importance of ensuring that the individual being verified is physically present in front of the camera in real-time, a process known as Presentation Attack Detection (PAD). The document explains how liveness detection can enhance security for various applications, including identity verification, age verification, and digital identity creation. It details the differences between active and passive liveness, highlighting the advantages of passive liveness in reducing user friction and increasing accessibility. The paper also addresses the vulnerabilities of biometric systems without liveness detection, emphasizing the role of liveness in preventing fraud and establishing trust in digital interactions. Furthermore, it discusses the compliance aspects of liveness detection in relation to regulations such as KYC and AML. Overall, the paper presents a comprehensive view of how liveness detection strengthens digital identity processes.