Upon the request of the adoptive parents or the adopted child, a clerk of the superior court may issue a certificate of adoption that states the date and place of adoption, the birthday of the child, the names of the adoptive parents, and the name the child has taken. Unless the child has been adopted by a stepparent or by a relative, as defined in subdivision (c) of Section 8616.5, the certificate shall not state the name of the birth parents of the child.