(1) The appellant must tell the health care authority (HCA) hearing representative and the office of administrative hearings (OAH) as soon as possible, when the party's mailing address changes.

(2) If a party does not notify the HCA hearing representative and OAH of a change of mailing address, OAH continues to send notices and other important papers to the last known mailing address. If this happens, the administrative law judge may find that the party received the documents or waived the right to receive those documents.