If the parents named on the Birth Certificate were married at the time of birth, there is an assumption that they are the biological parents of the child.  However, if it is discovered later that the named father is not the biological father, Florida has a statute regarding “dis-establishment” of paternity.  The law is complicated and narrowly applied, and courts have applied the statute differently.  The best advice is to seek the advice of an experienced family attorney if you find yourself in this dilemma.