In the Family Rights Issue Links sticky thread, There are links that tell people how to handle the knock on the door of CPS. It basically states that unless there is a warrant or court order, you don’t have to let them in or even open your door. That’s the mistake that people make. They open their door and let them in. Doing so waives their right to a search warrant and/or court order. In many areas, it is relatively difficult to get such things and even if they do produce a search warrant, it gives you time to prepare for the next visit.