Birth certificate and paternity.
OK so I'm not asking for a judgement just facts please. My baby is 8 months old. When I fell pregnant there was a slight chance it could be my ex's, however we only slept together once so I was almost definite he wasn't, and the dates didn't seem quite right... so I put who I thought was the father down I have not discussed my doubts with anyone. However as my son grows I'm worried he looks like my ex I don't want to do the wrong thing by my son but I'm very conscious that I could hurt a lot of people... if I was to get a paternity test to prove the father would it be expensive or difficult to change the name of the father on the birth certificate?