The Oklahoma Affidavit As To Military Service Model Form is a state-specific document used to certify that a person has served in the United States military. It is commonly used in order to obtain certain benefits, like educational aid or veterans’ benefits, or to prove military service for employment purposes. There are two types of Oklahoma Affidavit As To Military Service Model Form. The first is the Active Duty Form, which is used for those who are currently serving or have served in the active duty military. This form requires the service member to provide information such as name, branch of service, dates of service, and discharge status. The second type is the Reserve and National Guard Form, which is used for those who are serving or have served in the reserves or National Guard. This form requires the name, branch of service, dates of service, and current status. Both forms must be signed and notarized by the service member in order to be valid.