Okla. Stat. tit. 41 § 9
Notice to Terminate Tenancy
Operative Text
The notice to terminate the tenancy required in this chapter may be served on the tenant, or, if he cannot be found, by delivering the same to some person over the age of twelve (12) years, residing on the premises, having first made known to such person the contents thereof; or, if service cannot be made by the use of reasonable diligence on the tenant or on any person over the age of twelve (12) years residing on the premises, the same may be served by posting said notice at some conspicuous place on the building on said premises and if there be no buildings on said premises then said notice shall be posted at some conspicuous place on said premises and if said notice is posted, a copy of said notice shall be mailed to the tenant at his last-known address by registered mail and such notice shall operate to terminate the tenancy at the end of the period after the date of such posting and mailing that it would have been terminated by personal service of such notice on the date of such posting and mailing; provided, that in no event shall such posting and mailing terminate any tenancy within a period of less than ten (10) days from the date of such posting and mailing.
Oklahoma statute 41 O.S. § 9 establishes a tiered process for delivering a notice to terminate a tenancy. Personal service on the tenant is the first method; if the tenant cannot be found, the notice may be left with a resident of the premises who is at least 12 years old, provided that person is informed of the notice's contents. If neither of those options is possible after reasonable diligence, the notice may be posted conspicuously on the building or premises and simultaneously mailed to the tenant's last-known address by registered mail, with the termination period running no fewer than ten days from the date of posting and mailing.
Plain English — not legal advice.
Under 41 O.S. § 9, compliant operators follow a specific sequence when serving a termination notice: they first attempt personal delivery to the tenant, then delivery to a qualifying resident (age 12 or older) on the premises, and only resort to posting and registered-mail service after reasonable diligence has been exhausted. When posting is used, operators generally document their prior attempts at personal service to demonstrate that reasonable diligence was exercised. They also ensure the posted notice is placed in a conspicuous location and that a copy is sent by registered mail to the tenant's last-known address on the same date, keeping in mind the ten-day minimum termination window that applies to this method.
General guidance for property managers — not legal advice for your specific situation. Consult an attorney for advice on your case.
Under 41 O.S. § 9, tenants have a right to receive termination notices through a legally prescribed process, and a notice that was not properly served may be challengeable. If a landlord skips directly to posting without first making reasonable efforts to serve the tenant or a qualifying household member, that procedural shortcut could be raised as a defense in an eviction proceeding. Tenants who believe a notice was improperly served may wish to consult a tenant-rights organization or legal aid provider familiar with Oklahoma landlord-tenant law to understand the options available to them.
General guidance for tenants — not legal advice for your specific situation. Consult a tenant-rights organization or attorney for advice on your case.
Generated October 18, 2026 — auto-generated, not yet human-reviewed. See /transparency for methodology.
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