Criminal Cassation Appeal in Turkey for Foreign Defendants: CMK Articles 286 and 291, Yargıtay and the Current 2-Week Deadline

1. Temyiz is the Court of Cassation stage after regional appellate review

The Turkish Court of Cassation reviews qualifying Regional Court decisions under the Criminal Procedure Code. Its role differs from the Regional Court’s broader istinaf function.

The defendant cannot assume that every conviction automatically reaches Yargıtay. Article 286 contains exclusions and categories of decisions that are final at the regional level.

The first task is therefore temyizability.

2. Article 286 determines which regional decisions can be taken to Yargıtay

The offence, sentence, type of regional decision and statutory exceptions all matter. A lawyer should read the current Article 286 rather than rely only on the remedy notice printed in the judgment.

Some decisions that appear serious can still be final under a statutory exclusion; others remain open to cassation.

The exact operative regional judgment should be classified.

3. The two-week rule and the 1 June 2024 transition

For decisions rendered on or after 1 June 2024, CMK Article 291 gives two weeks from service of the judgment together with its reasons to request cassation. For decisions rendered before that date, CMK provisional Article 6(1)(c) and (e) preserve the former time-limit and additional-reasons rules. The transition depends on when the decision was rendered, not merely when it was served.

The date of regional hearing or electronic upload is not automatically the same as legal service.

Under CMK Article 294, the cassation application must state the legal grounds for reversal; Article 298 requires the Court of Cassation to reject an application if it finds that the petition contains no cassation grounds. Law No. 7499 repealed the additional-reasons procedure in Article 295 for the new regime. For decisions rendered on or after 1 June 2024, include the grounds within the applicable two-week period and do not assume that an unreasoned placeholder creates extra time to supply them.

4. Translation and service should be verified immediately for foreign defendants

A defendant who cannot read Turkish must still understand the reasoned judgment in time to instruct counsel. Interpretation at the hearing does not substitute for reviewing the written reasoning.

The lawyer should maintain the e-notification or postal record.

If service was defective, raise the issue with evidence rather than simply ignoring the deadline.

5. Some Regional Court decisions are final and use extraordinary remedies only

If Article 286 excludes ordinary temyiz, the judgment can become final subject to extraordinary legal mechanisms where their strict conditions exist.

Do not file repetitive ordinary cassation petitions where the law makes the decision final.

Instead, assess retrial, chief prosecutor remedies, Constitutional Court or ECHR routes according to the actual violation.

6. A cassation petition should identify legal errors precisely

Yargıtay is not assisted by a general statement that the decision was unfair. The petition should identify the provision misapplied, procedural rule breached or reasoning defect affecting the judgment.

Organise grounds by offence elements, evidence legality, procedure and sentence.

Cite the relevant part of the regional judgment and file record.

7. Temyiz focuses strongly on legal compliance

Questions of statutory interpretation, offence classification, limitation, jurisdiction, mandatory defence, unlawfully obtained evidence and sentencing provisions are classic cassation issues.

The petition should explain the legal consequence requested—reversal, correction or another result permitted by law.

Do not treat Yargıtay as a new fact-finding prosecutor.

8. Factual disagreement should be linked to a reviewable legal defect

A complaint that a witness was “lying” is weaker at cassation stage unless connected to a reasoning contradiction, evidentiary rule or failure to address decisive evidence.

The Regional Court’s factual role should be respected while identifying errors within the cassation standard.

The petition should not simply duplicate the istinaf filing word for word.

9. Fundamental procedural violations can justify reversal

Improper court composition, denial of defence, failure to hear mandatory evidence, jurisdiction defects or serious notification/interpretation violations can be legally decisive.

Where the defence objected below, cite the objection and court response.

Some fundamental errors can be considered under mandatory review rules even beyond ordinary objection preservation.

10. A judgment must respond to decisive arguments

Reasoned decision rights require the court to explain why it accepted the conviction and rejected material defence points. Formulaic or internally contradictory reasoning can create legal error.

The cassation petition should identify the unanswered decisive issue.

Length alone does not equal adequate reasoning.

11. Sentencing-law mistakes are reviewable

Incorrect basic penalty, aggravation/reduction sequence, attempt, participation, concurrence, recidivism or discretionary mitigation can alter the sentence unlawfully.

Calculate the statutory sentencing chain independently.

A foreign defendant’s nationality should not be used as an unlawful aggravating factor.

12. Unlawful evidence can produce a legal cassation ground

Search, interception, digital examination and statement evidence must comply with CMK and constitutional standards. A conviction materially based on unlawfully obtained evidence can be challenged.

The defence should identify the order, defect and role of the evidence in the judgment.

Minor technical irregularities should be distinguished from substantive illegality.

13. Foreign defendants should coordinate Turkish and international consequences

A final Turkish conviction can affect residence, deportation, foreign professional status, international travel or recognition abroad. Those consequences should not distort the cassation legal analysis but should be planned.

Foreign judgments or documents used in mitigation should be translated reliably.

Consular communication does not replace Turkish appellate counsel.

14. Detention and judicial control continue under separate review

Temyiz filing itself does not automatically release a detained defendant or lift travel control. Current risk and proportionality should be raised through appropriate petitions.

Length of proceedings can affect detention assessment.

Keep the merits and liberty applications coordinated but legally distinct.

15. Yargıtay procedure follows the statutory review framework

Whether a hearing is held depends on the current CMK provisions and case characteristics. Many cassation reviews are conducted on the file.

The defence should not assume personal attendance will occur.

Written grounds must therefore be complete and clear.

16. Yargıtay can uphold, reverse or take other statutory action

The result depends on the identified error and CMK powers. A reversal can return the case for further proceedings or produce another legal consequence depending on the issue.

The post-remand court must follow applicable binding directions under the procedural framework.

The defence should plan for both finality and remand scenarios.

17. After ordinary remedies end, only extraordinary or constitutional/international routes remain where conditions exist

Retrial under CMK Article 311 is not a substitute for a missed ordinary appeal and requires specific statutory grounds. Constitutional Court individual application and ECHR proceedings also have separate admissibility and time rules.

Do not wait until finality to identify a preserved constitutional complaint.

Bakırcı & Keskin Hukuk Bürosu has physical offices in Istanbul and Mersin. Criminal appellate matters throughout Türkiye can be coordinated from these offices subject to competent court and procedure.

Conclusion

For Regional Court decisions rendered on or after 1 June 2024, Turkish criminal temyiz uses a two-week period from service of the reasoned judgment, but only decisions open to cassation under Article 286 can reach Yargıtay. Foreign defendants should verify temyizability first, then focus the petition on reviewable legal and procedural errors rather than repeating the istinaf petition. Earlier decisions require the transitional analysis in CMK provisional Article 6.