Yes, the one with the stamp ... it is for a court action. It would be for evidence ... one party v another party. So, if a NSW Supreme Court action, the affadivit will have other attachments : A; B; C; ..... to at least H.
Prior to 1976, NSW family disputes, maintenance, custody were determined in accordance with NSW laws. So a judicial separation would be heard "in camera" ( a closed court, not open to the general public) and documents proving parentage for children would be tended ... e.g. a NSW certified birth cert ...
JM