Does a private property sign on the door of an occupied home mean no one can knock on the door or ring the bell?

A private property sign indicates that the homeowner wishes to limit access to their property, but it doesn't legally prohibit someone from knocking or ringing the bell. While the sign expresses the homeowner's desire for privacy and discourages uninvited visitors, individuals can still approach the door unless local laws or statutes explicitly state otherwise. However, it's best to respect the homeowner's wishes and avoid knocking or ringing unless invited.