<p>Are you certain that your parents went thru a formal court process to give up their parental rights and have your sister adopt you? Can you check for sure??? (that would be extremely strange especially if your bio parents continued to send money.)</p>
<p>Perhaps this was just an informal family situation w/o a court process. Or maybe the court process was a Guardianship process??? If so, then your bio parents would still be your parents for FAFSA purposes. </p>