The Oregon Co-Petitioner's Certificate of Mailing to the Division of Child Support is a form that is completed and signed by both parties involved in a child support case. This document is used to confirm that the corresponding documents have been mailed to the Division of Child Support. It is important to note that the Oregon Co-Petitioner's Certificate of Mailing to the Division of Child Support is not a substitute for service of process. There are two types of Oregon Co-Petitioner's Certificate of Mailing to the Division of Child Support. The first is the "Request for Child Support Services" form and the second is the "Request for Review" form. The "Request for Child Support Services" form is used to initiate a child support case and the "Request for Review" form is used to request a review of an existing child support case. Both forms must be completed and signed by both parties in order to be accepted by the Division of Child Support.