What about Green Card denials (immigrant visa denials)?
If your petition or application is denied or revoked (for US immigration, Green Card, or other issues) by the U.S. Citizenship and Immigration Services (USCIS), that decision may, in most cases, be appealed to a higher authority for review.
 
In immigration proceedings, the appellate review authority is divided between two separate government organizations:
1.The Administrative Appeals Office (AAO), within USCIS,
2.The Board of Immigration Appeals (BIA), under the jurisdiction of the Executive Office for Immigration Review in the U.S. Department of Justice.
 
If your petition or application is denied or revoked by USCIS, carefully review the written decision.  The notice (Form I-292) will inform you of the reasons for the denial, the proper appellate jurisdiction, the applicable deadlines, and the correct USCIS form to file an appeal.