36 C.F.R. § 1150.26 Certificate of service.
Title 36 - Parks, Forests, and Public Property
The original of every document filed and required to be served upon parties to a proceeding shall be endorsed with a certificate of service signed by the party making service or by his/her attorney or representative, stating that such service has been made, the date of service, and the manner of service, whether by mail or personal delivery.
Title 36: Parks, Forests, and Public Property
PART 1150—PRACTICE AND PROCEDURES FOR COMPLIANCE HEARINGS
Subpart C—Form, Execution, Service and Filing of Documents for Proceedings on Citations
§ 1150.26 Certificate of service.