Transparency. Most states allow "nanny cams" as long as they are visible (not hidden in a smoke detector) and do not record in private areas (bathrooms, the caregiver’s sleeping quarters). Legally, you must inform the caregiver in writing that recording is taking place. Failure to do so can result in criminal charges for eavesdropping.
If privacy is a major concern but you still want security: Transparency
Focus cameras on entry points (doors, windows) and high-traffic areas like hallways. the caregiver’s sleeping quarters). Legally