Hawaii Motion for Service by Mail and Declaration is a legal document used in Hawaii courts to request permission from the court to serve a legal document to another party through the mail. It must be filed by the petitioner who is filing the suit to serve the respondent with the legal documents. The motion must include the respondent's address and the petitioner's declaration, which is a statement of facts the petitioner is asserting in the case. There are two types of Hawaii Motion for Service by Mail and Declaration: one is for personal service, and the other is for substitution of service. Personal service requires a process server to deliver the legal documents to the respondent's address, while substitution of service allows the petitioner to serve the respondent through the mail. The motion must be approved by the court before service by mail can be conducted.