When CPS arrives unexpectedly, staying calm is the most important first step. You have the right to ask for the social worker's name, identification, and the reason for the visit. Unless CPS has a warrant or an emergency situation, you are not required to let them inside your home. Anything you say can be included in their report, so keep communication brief and factual. Avoid explaining or defending yourself emotionally, as it can be misinterpreted. Politely request written information about the allegations. Speaking with a California dependency attorney immediately can prevent the situation from escalating.