Hi, I hope I’m posting this is the right place for some help. My son is a father to a four year old little boy. The back story is he was with a girl for around 7/8 months maybe, then they split up and she was pregnant. A little while after she was saying the baby wasn’t his but her on off boyfriend of several years. The baby was born and he wasn’t allowed to see him. So about 4/5 months down the line she admitted that my son was the father. So we had a DNA test done which proved my son was the dad. Well four years down the line my sons name is still not got his name on the birth certificate. My grandson is now calling himself by her boyfriends surname and that is his name on the play school register. Can anyone advise on how this could be done.