Unmarried parents establish their rights and obligations with respect to their minor children by filing a lawsuit to establish paternity. When children are born during a marriage, there is a presumption of paternity, which means that the law considers that child or children to be the legal children of the married couple, even if biologically, they are not. An unmarried biological father may file a claim with the Florida Putative Father Registry in order to prevent an adoption from occurring, without receiving notice of the same. An unmarried father’s rights may be adversely impacted by his failure to register with the Florida Putative Father Registry. A paternity case is usually initiated by a father that wishes to establish his rights to share time with his children and participate in decisions that affect the welfare of the children, or by a mother who seeks to establish the father’s child support obligation. A putative father may request that scientific testing in order to be sure that he is the biological father of the child. Florida law also provides for the disestablishment of paternity provided that certain requirements are met.