Families that want to adopt and give to adoption should know the difference between open and closed. A closed adoption is a process in which all information relating about the birth and the birth family to the future adopted will remain confidential. In this order of ideas, it will be very difficult for the adoptive family to be in contact with the birth family of the child.
However, this type of process is restricted to children who are not old enough to develop memories from their birth family before getting adopted. And, usually, the father is not even recorded in the birth certificate of the infant. This type of process is less and less common among adoption processes, and it has brought the emergence of ONGs and private organizations to help people to reconnect with their biological families.