Washington Response To Petition To Decide Parentage is a form used by the courts in the state of Washington to establish parentage when paternity is in question. It is most commonly filed when a mother is unmarried or the father is unknown. The form is used to establish the legal relationship between a parent and a child, as well as the rights and responsibilities of the parent. There are two types of Washington Response To Petition To Decide Parentage forms: a Response to a Petition to Establish Parentage, and a Response to a Petition to Disestablish Parentage. The Response to a Petition to Establish Parentage is used when a parent is seeking to establish parentage. The form requires the respondent to acknowledge or deny parentage and provide information related to the child’s birth. The Response to a Petition to Disestablish Parentage is used when a parent is seeking to terminate parentage. The form requires the respondent to acknowledge or deny parentage, as well as provide information related to the child’s birth and any factors that may have changed since the child’s birth.