I have a newborn daughter 9 weeks old. I left my ex partner (1yr de facto) when I was 3 months pregnant because I was not happy. He lives in Victoria and I moved back to Queensland where I used to live. I regained the old job I had and worked until days before I gave birth without any financial support from him. However, since I left, the ex has been trying to persuade me to move back and try again to which I always reply with, "I want to have a baby shower here or I want to give birth here with friends and family". I thought it would be good if we get back together for my child's sake but I found out that he has been seeing a new girl and is living with him already. I was so upset and he blocked me off his phone. After a few weeks, I gave birth and they found out from a common friend. Him and his mum called me and asked how I was. They were all friendly and so I thought to set aside my anger for my child's sake and communicate again. His mum flew from Victoria to Queensland to meet my child. All is going well until recently I filed a registration of birth for my child, I asked the ex to sign the form and return to me. But after a few days waiting, he told me he doesnt want the child to have my surname (I was married before and still currently using the dead ex husband's surname) and use his name instead. On top of that, he threatens to take me to court and get 50/50 custody of children or even take full custody of our baby. My legal questions are: Are my chances good in having full custody of my child? How will it work if we live on a diffrent state? Is it true that I will be ordered to move back to Victoria? Please shed some light.