A Hawaii Petition for Intervention is a legal document used to request permission to intervene in a civil case. This petition is typically used by someone who has an interest in the case, but is not a party to the case. The petitioner is asking the court to allow them to become a party to the case and assert their interests. There are two types of Hawaii Petition for Intervention: voluntary and mandatory. A voluntary petition is filed when the petitioner believes they have a valid interest in the case, but does not need to intervene to protect their interests. A mandatory petition is filed when the petitioner believes that they must intervene in order to protect their interests. In both cases, the petitioner must provide evidence of a valid interest in the case.