I just had a baby girl and I am not together with her father. He dumped me over the phone when I was about 5-6 mths preggers. He said that he was not ready for a relationship. He then left the country for 6 mths for work and is due home any day now. I just found out from a friend that he now has a girlfriend!!!!!!!!!!!!!!!!! Which makes me sick. I allowed my baby to take his last name and now I want to change it to mine. I am not doing this out of spite I just want all my babies to have the same last name. I will have more children and I want them all to have my last name. My question is kind of a legal one I guess...Do I need his permission to change her last name? We haven't gotten anything on paper---no custody agreement what so ever.