The Arkansas Certificate of Service is a document used by the Arkansas Department of Finance and Administration to verify that a taxpayer has been served with notice of an audit. It is also used to acknowledge the taxpayer's cooperation in providing records and documents necessary to complete the audit. There are two types of Arkansas Certificates of Service: the Corporate Certificate of Service and the Individual Certificate of Service. The Corporate Certificate of Service is used to verify that a corporation has been served with notice of an audit. The Individual Certificate of Service is used to verify that an individual taxpayer has been served with notice of an audit. Both types of Certificates of Service must be signed by the taxpayer or their representative and returned to the Arkansas Department of Finance and Administration.