The Oregon Certificate of Service is a document used by employers in Oregon to certify that their employees have completed a certain number of hours of service in order to be eligible for certain employee benefits. The document is signed by both the employer and the employee, and is required to be filed with the Oregon Bureau of Labor and Industries. There are two types of Oregon Certificate of Service: one for general service and one for military service. The general service certificate is issued to employees who have completed a minimum of 400 hours of service within a 12-month period, while the military service certificate is issued to employees who have served in the armed forces during a qualifying period of time. Both certificates must be filed with the Oregon Bureau of Labor and Industries in order to be eligible for certain employee benefits.