The Hawaii Certificate of Service is a document required by the state of Hawaii when filing legal documents. It is an affidavit stating that the documents have been served to the named parties of a case. There are three types of Hawaii Certificate of Service: personal service, substituted service, and service by mail. Personal service requires a process server to serve the documents in person. Substituted service requires the documents to be served to an adult member of the household, or a person of suitable age and discretion. Service by mail requires the documents to be served by registered, certified, or express mail. All three types of service must be completed according to the Hawaii Rules of Civil Procedure. The Hawaii Certificate of Service must be filed with the court in order for the service to be valid. The certificate must include the name of the person served, the type of service used, and the date and time of service. It must be signed by the process server, and may also include the address of the person served. The certificate must also be notarized by a Hawaii notary public.