In 1985, the law changed and allowed adoptees to obtain their original birth certificates -- effectively giving them the name of their birth mother and in most cases, their birth father.
Birth mothers could also apply for the birth certificate. They had given birth to the child, but they would never have known the child's name.
Complicating matters, both mother and child could apply a veto for 10 years -- stopping the other from finding them if they so wished.
We had to nominate a counsellor from a list that would take us through the process. I knew none of them so chose a woman who had the same initials as me (it turned out she and her husband used to work for my parents on our farm). I applied for my birth certificate and it wasn't long before I had a call from my counsellor.
She had the certificate. No veto! So we met, she advised me on the correct and proper way of going through the process and then handed me a piece of paper. There, for the first time, was the name of the woman who gave birth to me. No father's name.