“A litigant who loses in a federal court of appeals, or in the highest court of a state, may file a petition for a “writ of certiorari,” which is a document asking the Supreme Court to review the case. The Supreme Court, however, does not have to grant review. The Court typically will agree to hear a case only when it involves an unusually important legal principle, or when two or more federal appellate courts have interpreted a law differently. There are also a small number of special circumstances in which the Supreme Court is required by law to hear an appeal.”
I am not a lawyer, but this site states:
“A litigant who loses in a federal court of appeals, or in the highest court of a state, may file a petition for a “writ of certiorari,” which is a document asking the Supreme Court to review the case. The Supreme Court, however, does not have to grant review. The Court typically will agree to hear a case only when it involves an unusually important legal principle, or when two or more federal appellate courts have interpreted a law differently. There are also a small number of special circumstances in which the Supreme Court is required by law to hear an appeal.”