Does anyone know the policy on a client having security cameras in the home and not telling you?

Hey!!! so I've seen a few of these questions. Im personally not the biggest fan of security cameras in home as I feel like its too invasive, either way I don't let that stop me from accepting it. although, is there something I can do about a client who didn't tell me and I found out on my own, It just makes me very uncomfortable as a young girl. Toughts?