Turkey Insurance Claim Denied: SEDDK Complaint Process and Sigorta Tahkim

Turkey has one of the most consumer-friendly insurance dispute systems in the world — the Sigorta Tahkim Komisyonu (Insurance Arbitration Commission) provides free, binding arbitration that typically resolves cases faster than court proceedings. Whether your claim involves private health insurance (özel sağlık sigortası), complementary insurance (tamamlayıcı sigorta), or a dispute with the public SGK system, you have real options to fight back.

Why Insurers Deny Claims in Turkey

Turkish insurers deny claims for a predictable set of reasons, and Insurance Law No. 5684 provides specific protections against many of them.

Not medically necessary or out-of-network treatment. Private health insurers frequently deny claims citing that treatment was not covered under the policy schedule or that a non-contracted hospital was used without emergency justification. Under SEDDK regulations, insurers must act within 15 working days of receiving complete documentation before issuing any decision.

Pre-existing condition exclusions (hastalık bekleme süresi). Most tamamlayıcı sağlık sigortası policies impose waiting periods for conditions that existed before the policy start date. However, Article 1435 of the Turkish Commercial Code limits the non-disclosure defense to willful and material omissions — innocent non-disclosure cannot be the basis for full denial.

Lack of Prior Authorization Denied: How to Appeal" class="auto-link">prior authorization. Many tamamlayıcı policies require notification to the insurer before hospital admission (for non-emergencies). Failure to notify can affect coverage, but if the admission was an emergency, the urgency must be explicitly documented and invoked in any appeal.

SGK treatment catalog exclusions. Turkey's Social Security Institution covers a defined list of treatments through contracted facilities. Treatments outside the Global Bütçe or using non-designated hospitals are routinely denied. These denials follow their own administrative appeal path.

Motor insurance (Kasko/Trafik) disputes. Contested damage causation, documentation deficiencies, or attribution disputes after road accidents are common grounds for denial under both compulsory Trafik Sigortası and optional Kasko policies.

How to Appeal a Denied Claim in Turkey

Step 1: File a Formal Written Complaint with the Insurer

Submit a written complaint (yazılı başvuru) to your insurer's Müşteri Hizmetleri or Şikayet ve İtiraz department. Request the full denial reason in writing, citing the specific policy clause. The insurer must acknowledge within five business days and respond substantively within 15 working days under SEDDK regulations.

Step 2: File a Complaint with SEDDK

If the insurer fails to respond adequately or has violated regulatory obligations, file a formal complaint with the Insurance and Private Pension Regulation and Supervision Agency (SEDDK) at seddk.gov.tr (444 7 734). SEDDK investigates market conduct violations and can impose sanctions. This step can run in parallel with the arbitration process.

Step 3: File with the Sigorta Tahkim Komisyonu (STK)

The STK is Turkey's dedicated insurance arbitration body — free for small claims, low-cost for larger claims, and binding on insurers. You must have first submitted a formal complaint to the insurer and either received an unsatisfactory response or waited the prescribed period. File online at sigortatahkim.org.tr, upload all supporting documents, and pay the modest filing fee (free for claims under approximately TRY 12,000). Average resolution time is four to six months. STK decisions carry the same legal force as court judgments.

Step 4: Request Consumer Arbitration (for smaller claims)

For disputes below the annual TRY threshold, Consumer Arbitration Panels (Tüketici Hakem Heyeti) handle insurance disputes under Law No. 6502 on Consumer Protection. These are free, binding, and administered through provincial Directorates of Trade.

Step 5: Appeal to the Higher Arbitration Panel or Civil Court

If dissatisfied with an STK decision, appeal to the Üst Tahkim Kurumu within 10 days of the decision. For cases outside STK jurisdiction, the Asliye Ticaret Mahkemesi (Commercial Court of First Instance) provides a court-based alternative.

What to Include in Your Appeal

• Formal denial letter from the insurer with the specific policy clause or exclusion cited
• Complete copy of your insurance policy, including all special conditions and endorsements
• Medical records, hospital invoices, or damage assessment reports relevant to the claim
• Documentation of all prior communications with the insurer, with dates and reference numbers
• For health claims, a letter from your treating physician addressing the insurer's stated denial reason

Fight Back With ClaimBack

Turkey's STK arbitration system is one of the world's most efficient and consumer-friendly insurance dispute mechanisms. A well-prepared appeal citing Insurance Law No. 5684, Article 1435 of the Turkish Commercial Code, and the correct STK procedures gives you the best chance of reversal. ClaimBack generates a professional appeal letter in 3 minutes. Start your free claim analysis → Free analysis · No credit card required · Takes 3 minutes

Related Reading

• How to Write an Insurance Appeal Letter
• What Is Medical Necessity?
• Internal vs External Insurance Appeal