Oklahoma Apostille
The Oklahoma Secretary of State issues Apostilles. Note: Birth certificates must be certified copies from the Oklahoma State Department of Health; marriage licenses, divorce decrees and other court-certified documents must be dated within the past year.
Select Your Document
Requirements vary significantly by document type. Select your document below to view the specific requirements and start your application.
Business & Legal
Academic & Other
Common Questions
What is the County Clerk requirement?
No county clerk step is needed. The Oklahoma Secretary of State attaches the apostille to an original notarized document or a certified copy of a document issued by an Oklahoma statewide officer; court-certified documents must be dated within the past year.
Can I walk in?
Yes. The Oklahoma Secretary of State, 421 NW 13th St, Suite 210, Oklahoma City, is open Monday through Friday, 8:00am to 4:30pm; in-person requests take about 10-15 minutes per document (as of 2026-10-02).