Unless the lease was earlier terminated under the provisions of the Oklahoma Residential Landlord and Tenant Act or unless otherwise agreed upon, a tenancy for a definite term expires on the ending date without notice. If the tenant cannot be located, service shall be made by delivering the notice to any family member of such tenant over the age of twelve (12) years residing with tenant. If service cannot be made on the tenant personally or on such family member, notice shall be posted at a conspicuous place on the dwelling unit of the tenant. If notice is posted, a copy of such notice shall be mailed to the tenant by certified mail. If service cannot be made on the landlord personally, the notice shall be mailed to the landlord by certified mail.