I have a one-year-old son and his father is not on the birth certificate as he refused to sign. We did a legal DNA test when he was 6 weeks old which established paternity and I began receiving child support (he quit his job 2 weeks before I gave birth so only pays the bare minimum). He spent 90 minutes visiting our son when he was 2 months old, supervised by me. Since then he has refused to visit his son and communicate with me, refused to supply medical information requested by a doctor then a specialist when there were concerns for my son's health. He confirmed last month he had no intention of being part of our child's life. I have consistently tried to include him, sent updates, photos, videos etc., as I knew regardless of our personal issues our child had the right to have a relationship with both his parents. I offered to go to mediation and work out a parenting plan but his response was no. We were never in a serious relationship and when I found out I was pregnant decided it is best we work on establishing a good co-parenting relationship as we both agreed neither saw a romantic long-term future with the other. He was adamant I get an abortion and I obviously refused which soured things considerably on his behalf. His reason for not being part of his child's life is his new partner is not comfortable with the situation and does not want any part of it. My question is if he is not on the birth certificate but paternity has been established, does he have legal rights under Family Law? If he changes his mind in a few years can he force me to allow visitation? If he can come and go as he pleases is there any way for me to gain sole legal and physical custody of children without having to add him to the birth certificate? I am asking this as I have done everything in my power to give my son a chance to know his father over the last 12 months and nothing has worked, so moving forwards I'd like to give my child security and stability and not have issues years down the track of his father trying to enter his life without consideration and dragging me through family court demanding rights when he has point blank refused to be in his life now, and depending on our future situation may be emotionally damaging to my son. He would attempt to be part of his life if he was single which means if his current relationship fails I am worried he will begin the pattern of in and out of my son's life depending on if he's single or not, which is what I do not want.