Oklahoma Diploma Apostille
Oklahoma apostilles are issued by the Oklahoma Secretary of State for $25 per document ($20 is the authentication fee for non-Hague countries). An apostille can be attached to an original notarized document or a certified copy issued by an Oklahoma statewide officer. Send it with a cover letter to 421 NW 13th St., Suite 210, Oklahoma City, OK 73103: about 1-2 business days by mail, or 10-15 minutes per document in person. Last verified 2026-10-15 against https://www.sos.ok.gov/business/apostilles.aspx and https://www.sos.ok.gov/business/faq.aspx
At a Glance — 2026 Snapshot
| Issuing Authority | Oklahoma college or university registrar |
|---|---|
| Apostille Authority | Oklahoma Secretary of State 1-2 business days + mailing |
| Document Type | Registrar-certified copy of an Oklahoma diploma, notarized by an Oklahoma notary public |
| Apostille Fee | $25 per document |
| Processing Time | Mail: 1-2 business days. Walk-in: Same day (Oklahoma City) |
| Typical Uses | Immigration, citizenship by descent, marriage, study, work visas, international relocation |
| Accepted Countries | 129 Hague Convention countries, incl. the US (HCCH status table, checked 2026-10-12) |
| Non-Hague Countries | Requires additional authentication via U.S. Dept of State + consular legalization |
| Submission Locations | Oklahoma City: 421 N.W. 13th St (mail & walk-in) |
| Who Can Apply | Anyone – you, family, friend, or professional service |
⚠️ Common Rejection Reasons (Avoid These!)
Even small mistakes can lead to your apostille request being rejected. Double-check these points to save time:
- • Photocopy or Scan: Send the original notarized document, not a photocopy or scan.
- • Document Damage: If the certified copy has erasures, white-out, or damage, it may be rejected.
- • Payment Issues: Make sure to enclose the correct $25 fee per document.
🌎 Tips for Overseas Applicants
Applying for an Oklahoma apostille from outside the U.S. is possible with a few extra steps:
- • Obtaining the Certificate: Ask the registrar for a certified copy notarized by an Oklahoma notary public.
- • Mail-In Requests: You can mail your request to the Oklahoma SOS from overseas using a reliable courier (FedEx, DHL, UPS).
- • Use a Trusted Agent: You can hire an apostille service company or ask a friend in Oklahoma to handle it on your behalf.
- • Patience with Mail: International mail can add 1-3 weeks to the return journey.
🔴 Apostille vs. Legalization (Non-Hague Countries)
Important: An apostille is not accepted in countries that are not party to the 1961 Hague Convention.
- • Non-Member Examples: United Arab Emirates and Egypt require authentication + consular legalization instead.
- • Full Process: State SOS certification → U.S. Department of State authentication → Foreign embassy legalization.
- • Note on China: China joined the Apostille Convention on November 7, 2023, so apostilles are now accepted for China.
✅ Oklahoma Apostille Advantages
Oklahoma offers some of the best apostille services in the U.S.:
- • Fee: $25 per document.
- • Fast Processing: 1-2 business days by mail, same-day for walk-in requests.
- • No Appointment Needed: Walk-in service available during regular business hours.
- • Simple Process: No county clerk pre-authentication required for academic documents.
Accepted vs. Not Accepted Documents
Accepted for Apostille
- • Registrar-certified copy of an Oklahoma diploma, notarized by an Oklahoma notary public.
Not Accepted
- • Photocopies or scans without an original notarization.
Requirements Checklist
MUST HAVE
- Certified Oklahoma Diploma: A registrar-certified copy notarized by an Oklahoma notary public.
- Completed Apostille Request Form: List "diploma" as the document type.
- Correct Apostille Fee: $25 per document — check or money order payable to "Oklahoma Secretary of State".
CANNOT ACCEPT
- Uncertified or Unsigned Copies: Any diploma without an official seal and signature.
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