My son's father hasn't really been in his life he will be 7 in Feb and last seen his dad when he was just 2 years old. Me and my partner who have a 1 year old girl are getting married in March and my son wants to take his last name as he has mine just now. His real father isn't on his birth certificate and as I said has no contact what so ever part from the csa payments he makes every month. Would my son taking my partners last name affect the payments I get from the csa please help