Your employer may sometimes use cameras to secure staff and property. But your employer may not use this camera footage to address or judge you.
A hidden camera is not normally allowed. But is there frequent theft or fraud at your workplace, for example? If so, your employer may use a hidden camera to monitor employees under strict conditions.
Source: https://www.autoriteitpersoonsgegevens.nl/themas/cameratoezicht/cameratoezicht-bij-organisaties#mag-mijn-werkgever-mij-controleren-met-een-verborgen-camera, accessed April 22, 2024.