Washington Final Order on Petition to Challenge Paternity Acknowledgment or Denial is a court order issued by a Washington state court in response to a petition challenging the paternity of a child. The order may either acknowledge the petitioner’s claim or deny it. It will also outline any further action to be taken in order to resolve the matter. There are two types of Washington Final Order on Petition to Challenge Paternity Acknowledgment or Denial: Acknowledgment Order and Denial Order. An Acknowledgment Order confirms the paternity of the petitioner and grants legal rights to the petitioner as the father of the child. A Denial Order denies the petitioner’s paternity claim and does not grant any legal rights to the petitioner.