Can someone sue you on private property if you are not sure who it who?

Yes, someone can sue you for incidents that occur on private property, even if you are unsure of their identity. The lawsuit would typically be based on the circumstances surrounding the incident, such as negligence or liability. However, identifying the person is crucial for the lawsuit to proceed, as they would need to be named as the defendant. If you're facing such a situation, consulting with a legal professional is advisable.