Nicastro Piscopo, APLC | Louis M. Piscopo
Without knowing how your father got his Green Card, there is no way to know whether your are eligible for a Green Card as his derivative. Some petitions, do not allow derivatives. As an example, if your obtained his Green Card through a U.S. wife, or child, then you are not eligible for a derivative Green Card. So the first thing you need to find out from your father is how he qualified for his Green Card.
Answer Applies to: California