Onboarding Customers in Car Sharing Systems: Implementation of Know Your Customer Solutions Topics: Assistive Computer Vision; Face and Expression Recognition; Features Extraction; Human and Computer Interaction; Machine Learning Technologies for Vision; Object and Face Recognition; Object Detection and Localization In Proceedings of the 20th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications - Volume 3 VISAPP: VISAPP, 381-391, 2025 , Porto, Portugal