The Oklahoma Certificate of Service (OCS) is a pilot program that allows for electronic service of documents related to Social Security Administration (SSA) proceedings. The OCS allows attorneys, representatives, and claimants to serve documents electronically to the SSA, as an alternative to traditional paper filing. There are two types of Oklahoma Certificate of Service: the Oklahoma Electronic Service Certificate (ESC) and the Oklahoma Electronic Document Filing (EDF). The ESC allows attorneys and representatives to file documents electronically, without the need to mail or fax paper documents. The EDF allows claimants to file documents electronically, and receive a confirmation of filing and delivery from the SSA. Documents filed using the OCS are considered to be legally served, and the SSA is required to respond within the same timeline as if the documents were filed through traditional paper filing. The OCS is an important step forward in improving the efficiency of service of documents related to SSA proceedings. It provides a more reliable and secure method of document delivery, and allows for faster processing times. It also helps to reduce paperwork and administrative costs associated with filing documents with the SSA.