Appeal procedures in Turkish courts are one of the most important parts of Turkish litigation strategy. In many cases, the first-instance judgment is not the real end of the dispute. A party may still be able to challenge that judgment before the Regional Court of Appeal through istinaf, and in appealable cases may later seek cassation review before the Court of Cassation, known in Türkiye as Yargıtay. In the ordinary judiciary, the Turkish system is built around first-instance courts, Regional Courts of Appeal, and the Court of Cassation, and the Ministry of Justice’s overview explains that legal remedies in both ordinary and administrative jurisdiction are structured in two stages: appeal to the regional appellate court and appeal to the court of cassation. The Ministry’s current BAM portal also lists 17 Regional Courts of Appeal.
That structure matters because an appeal in Turkish law is not merely a formal complaint that the lower court “got it wrong.” Turkish appellate procedure is a technical field with its own deadlines, filing routes, review limits, admissibility rules, and enforcement consequences. A missed deadline, a poorly drafted appeal petition, or a misunderstanding of whether the relevant decision is final or appealable can be just as damaging as a weak merits case. For that reason, anyone handling civil or commercial litigation in Türkiye should understand how istinaf and cassation review actually work in practice.
The Basic Structure of Appellate Review in Turkish Civil Procedure
Under the Code of Civil Procedure No. 6100, the ordinary civil appeal system is divided into two main levels. The first level is istinaf, which is the review conducted by the civil chambers of the Regional Courts of Appeal. The second level is temyiz, meaning cassation review by the Court of Cassation. The Ministry of Justice describes the Regional Courts of Appeal as the courts responsible for reviewing judgments and decisions of first-instance courts that are not yet final, and it describes the Court of Cassation as the high court responsible for reviewing decisions and judgments of the courts of justice that the law does not leave to another judicial authority.
This two-level model is a major feature of modern Turkish procedure. It means the appellate process is no longer built around a single high-court review in every ordinary case. Instead, many disputes are filtered and resolved at the istinaf stage, while only certain Regional Court of Appeal decisions remain open to cassation review. This design serves a practical function: it allows broader review at the regional level while reserving the Court of Cassation for decisions that the law permits it to examine.
What Is Istinaf in Turkish Courts?
In Turkish civil procedure, istinaf is the ordinary appeal remedy against eligible first-instance decisions. Article 341 of the Code of Civil Procedure states that final decisions of first-instance courts may be challenged through istinaf, and that decisions rejecting requests for interim injunctions or provisional attachments, as well as decisions rendered upon objection after those measures are granted, are also appealable by istinaf. The same article also sets a monetary finality rule for certain property cases, meaning some lower-value judgments are final and cannot be appealed.
In practical terms, istinaf is more than a narrow legality check. The Regional Court of Appeal can review both procedural and substantive aspects of the first-instance decision within the framework set by the Code. It can reject the appeal on the merits, remove the judgment and remand in some procedural-defect scenarios, or in appropriate cases correct the legal mistake and give a new merits decision itself. That makes istinaf a very powerful stage in Turkish litigation. It is often the phase where the case is either effectively finished or fundamentally reshaped.
Which First-Instance Decisions Can Be Appealed?
The general rule is that final first-instance judgments are appealable by istinaf unless the law makes them final. Article 341 expressly covers final decisions, and also extends appealability to certain interim-protection rulings. However, the same provision establishes a monetary cut-off for some property cases. Because the statutory monetary thresholds in the Code have been subject to later legislative updating and annual revaluation mechanisms, the safer practical approach is not to rely on the historical TL figures printed in older consolidated texts, but to check the currently effective threshold at the date relevant under the current statutory scheme. Official parliamentary materials from the recent legislative amendments state that the monetary thresholds used for Articles 341, 362, and 369 are tied to the date the action was filed, and official materials also state that these thresholds are subject to annual revaluation mechanisms.
That point is highly important in practice. Lawyers sometimes look at the first-instance judgment alone and assume an appeal is automatically open. But in Turkish law, the appealability analysis may turn on the subject matter of the case, whether the decision is final or interlocutory, whether the relevant dispute falls within a category deemed final by statute, and whether the monetary threshold has been exceeded. A correct appellate strategy therefore starts with a technical admissibility check, not with the merits argument.
The Time Limit for Filing an Istinaf Appeal
Article 345 of the Code of Civil Procedure sets the basic time limit for istinaf at two weeks. The period starts when the judgment is duly served on each party, unless a special statute provides otherwise. This deadline is strict and central to appellate practice. Once the period expires, the first-instance court rejects the appeal petition if it was filed out of time or if the challenged decision is final and non-appealable. That rejection itself may then be challenged within one week.
This means timing is not a clerical detail. In Turkish practice, parties must calculate the appeal period from proper service, not from informal knowledge of the judgment or from the hearing date unless the law expressly says otherwise in a special context. Any party considering istinaf should therefore review service records carefully and prepare the petition early enough to avoid last-minute filing errors.
How the Istinaf Petition Is Filed
Article 342 provides that an istinaf application is made by petition, and the petition must include the parties’ identities, representatives if any, the court and date of the challenged decision, the date of service, a summary of the decision, the appeal grounds and reasoning, the result requested, and the signature of the applicant or counsel. Article 347 adds that the petition is served on the opposing party by the court that rendered the decision, and the opposing party has two weeks to respond. After the petitions are completed or the periods lapse, the first-instance court sends the file to the competent Regional Court of Appeal.
This filing route is strategically important. In Turkish civil cases, the appeal is not filed directly with the Regional Court of Appeal as a general rule; it is lodged through the court that rendered the decision. That means the formal requirements of the petition, the filing costs, and the service sequence all matter from the beginning. A weak appeal petition can narrow the scope of review and weaken the appellant’s position before the file even reaches the BAM chamber.
Incidental Appeal and Response Strategy
Article 348 creates a form of incidental appeal. It states that the party served with the appeal petition may also appeal through its response petition, even if that party had no independent right to appeal or let the main appeal period expire. But if the principal appellant withdraws the appeal or the BAM rejects it without examining the merits, the incidental appeal falls with it.
This rule matters because it changes the way parties should think about appellate defense. In Turkish litigation, the respondent to an appeal does not simply answer the appellant’s arguments. The respondent must also decide whether it wants to make its own appellate attack through the response petition. A passive response can sometimes forfeit a valuable opportunity to widen the appellate debate.
Does Istinaf Automatically Stop Enforcement?
No. Article 350 states that filing an istinaf appeal does not automatically stay enforcement. The Code preserves the stay mechanism under Article 36 of the Enforcement and Bankruptcy Law, and it specifically adds that no stay of enforcement may be granted for maintenance decisions. Article 350 also provides that decisions in matters of personal status, family law, and rights in rem over immovable property cannot be enforced until they become final.
This is one of the most misunderstood parts of Turkish appellate practice. Many litigants assume that once an appeal is filed, the judgment is effectively frozen. Turkish law does not work that way. In many cases, the prevailing party may still move toward enforcement unless the losing party secures the legally required stay. So appellate planning must always be coordinated with enforcement planning.
What the Regional Court of Appeal Reviews
The BAM first conducts a preliminary review on the file. Article 352 states that the chamber examines whether the file belongs to another chamber, whether the decision is final, whether the application was timely, whether the filing conditions were satisfied, and whether the appeal reasons or grounds were stated at all. If those conditions are not met, the BAM gives the necessary ruling at that stage.
If the file passes the preliminary review, the scope of the substantive examination is governed by Article 355. That provision states that review is limited to the grounds stated in the appeal petition, but the Regional Court of Appeal examines public-order issues ex officio. This is a crucial rule. It means Turkish istinaf review is not completely open-ended, yet it is also not mechanically limited where public-order concerns arise. The appeal petition therefore matters enormously because it frames the ordinary scope of review.
What the Regional Court of Appeal Can Do
Article 353 is the key provision describing the BAM’s powers. It allows the Regional Court of Appeal, without holding a hearing, to remove the first-instance judgment and send the file back for retrial in certain fundamental procedural situations, such as where a disqualified judge decided the case, where the court wrongly ruled on jurisdiction or competence, where another lawsuit condition was missing, where improper procedural rulings were made, or where no evidence at all was collected or assessed despite being presented on the merits. The same article also allows the BAM, again without hearing, to reject the appeal on the merits if the first-instance judgment is procedurally and substantively lawful, or to correct the legal mistake and decide the merits anew where no retrial is needed, or to complete certain curable deficiencies and then decide anew.
This provision is one of the reasons istinaf is so significant in Türkiye. The BAM is not limited to a binary “approve or quash” model. In suitable cases it can effectively replace the lower court’s judgment with its own corrected merits decision. That gives appellate advocacy at the regional level real weight, especially in civil and commercial disputes where the legal qualification may be wrong but the factual record is already sufficiently complete.
Hearings, New Allegations, and New Evidence in Istinaf
Article 356 states that, outside the situations covered by Article 353, BAM review is conducted with a hearing. But Article 357 places important limits on what can happen there. No counterclaim may be filed, intervention cannot be sought, amendment of the claim is not allowed, and—apart from matters the BAM must consider ex officio—new allegations and defenses not raised in first instance cannot be heard. As a rule, new evidence also cannot be relied upon, except for evidence that was duly identified in first instance but wrongly rejected without examination, or evidence that could not be presented earlier because of force majeure.
That rule has major practical consequences. Turkish istinaf is not designed as a chance to rebuild the case from zero. It is mainly a review-and-correction stage based on the first-instance record, with carefully limited room for evidentiary supplementation. For that reason, the first-instance proceedings remain critically important even when appeal is likely. A party that neglects its evidentiary case below may discover that istinaf is not a safe place to repair every omission.
What Is Cassation Review in Turkish Courts?
The second stage of appellate review is temyiz, meaning cassation review before the Court of Cassation. Article 361 states that final BAM civil-chamber decisions that are appealable, and decisions rendered upon actions to set aside arbitral awards, may be challenged by cassation within one month from service. The same article adds that even the prevailing party may apply for cassation review, provided it has a legal interest.
Cassation review is not available against every BAM decision. Article 362 lists categories of BAM decisions that are not subject to cassation, including certain lower-value judgments, certain matters within the jurisdiction of the civil peace court, non-contentious matters, certain civil-status record cases, certain transfer-of-case decisions, and decisions on temporary legal protections. Because both subject-matter exclusions and monetary finality rules matter here, parties should verify appealability carefully before assuming that Yargıtay review is open.
The Monetary Thresholds in Cassation Review
The Code itself contains monetary finality language in Article 362, but current Turkish practice must be read together with later legislation on annual revaluation and the timing rule for which threshold applies. Official legislative materials state that the monetary thresholds relevant to Articles 341, 362, and 369 are determined according to the amount applicable on the date the lawsuit was filed, and that annual revaluation changes do not alter the relevant threshold for remand decisions issued after BAM removal or Yargıtay reversal. Because these rules have been revised by later legislation, practitioners should verify the currently effective threshold rather than rely on old nominal numbers reproduced in historical consolidations.
This timing rule is especially important in long-running litigation. Without it, the appealability of the same case could shift unpredictably as thresholds change over time. The legislative materials show that the system now anchors the relevant threshold to the filing date of the action for these appellate provisions.
Does Cassation Automatically Stay Enforcement?
Again, the answer is no. Article 367 states that cassation does not stay enforcement, subject to the stay-of-execution rules in the Enforcement and Bankruptcy Law, and that no stay can be granted for maintenance decisions. It also repeats that decisions concerning personal status, family law, and rights in rem over immovable property cannot be enforced until they become final.
As a result, parties considering Yargıtay review must assess not only whether the legal grounds are strong, but also whether the judgment may already be enforceable while cassation is pending. A technically correct cassation petition can still leave the losing party commercially exposed if stay strategy is ignored.
How Yargıtay Reviews the Case
Article 369 is one of the most important provisions in the cassation system. It states that the Court of Cassation is not bound by the parties’ stated cassation grounds and may also review other issues it sees as contrary to the clear wording of the law. As a rule, Yargıtay conducts the review on the file. However, the same article allows hearings in certain categories of cases and in claims exceeding the relevant hearing threshold if a party requests a hearing in its cassation or response petition, and Yargıtay may also order a hearing ex officio to obtain information.
This shows the conceptual difference between istinaf and cassation. The BAM operates as a broader appellate court with powers that can include fresh merits decisions. Yargıtay, by contrast, is primarily a high court of legality and jurisprudential supervision. It reviews the BAM decision through a legal lens, though that legal review can still reach issues beyond the exact wording of the cassation petition where a clear statutory conflict appears.
Approval, Corrective Approval, and Reversal
Article 370 provides that Yargıtay must state the legal reasons when it approves a decision. It may also approve a decision by correction where the result is legally sound but the law was misapplied in a way that does not require a new trial, and it may correct clear identity, writing, or calculation errors. It may also approve by substituting or correcting the reasoning if the result is correct but the lower court’s reasoning is wrong.
Article 371 then lists the grounds for reversal. These include incorrect application of the law or of the contract between the parties, defects relating to litigation prerequisites, unlawful refusal of evidence relied on by a party to prove its case, and procedural errors or omissions that affected the decision. This provision is especially important because it shows how central evidence and procedure remain even at the cassation stage. A reversal does not require only abstract legal error; a serious evidence ruling or procedural defect that affected the outcome can also justify reversal.
What Happens After a Reversal?
Article 373 governs what happens after Yargıtay reverses. If the cassation chamber reverses a BAM decision that had rejected the istinaf application on the merits, the BAM decision is removed and the file is sent to the first-instance court that rendered the original judgment, or another appropriate first-instance court. If Yargıtay reverses a BAM decision that had corrected the judgment or decided the merits anew, the file is sent back to the BAM that rendered that decision, or another appropriate BAM. The BAM then decides whether to comply with the reversal after inviting and hearing the parties.
Article 373 also regulates resistance. If the first-instance court or the BAM resists after reversal and the new decision is again challenged, the review is conducted by the Civil General Assembly of the Court of Cassation. The article further states that compliance with the Civil General Assembly’s decision is mandatory. This is one of the key mechanisms by which Yargıtay maintains coherence and final authority in Turkish civil jurisprudence.
Why Appellate Drafting Matters So Much
Turkish appellate procedure makes the quality of the petition extremely important. In istinaf, the stated grounds ordinarily define the scope of review, apart from public-order issues considered ex officio. In cassation, although Yargıtay is not strictly bound by the parties’ grounds in the same way, the petition still matters because it frames the legal attack, directs the court to the main errors, and influences whether the case is seen as involving a serious legal problem, an evidentiary issue, or a procedural defect.
A good Turkish appeal petition therefore should do more than repeat the first-instance pleadings. It should identify the precise ruling being challenged, explain whether the problem is procedural, evidentiary, or substantive, connect the complaint to the correct appellate provision, and show why the error mattered to the result. Generic appeals are risky. In a system where deadlines are short and review rules are technical, precision is often decisive.
A Practical Way to Think About Istinaf and Cassation
A useful practical distinction is this: istinaf is usually the stage for comprehensive appellate correction, while cassation is the stage for high-level legal control. The Regional Court of Appeal can reject the appeal, remand, correct the judgment, or decide the merits anew under Article 353. Yargıtay, by contrast, focuses on legality, approval, corrective approval, or reversal under Articles 369 to 371, and then channels the file back through the system under Article 373.
That distinction should shape litigation strategy from the beginning. If a party expects the case may go to istinaf, it must build the factual and evidentiary record carefully in first instance because BAM review is not a blank slate. If a party expects eventual Yargıtay review, it must also preserve and articulate the legal questions clearly because cassation is driven by legal review, not wholesale retrial.
Conclusion
Appeal procedures in Turkish courts are structured, technical, and strategically decisive. In civil cases, the ordinary path runs from the first-instance court to the Regional Court of Appeal through istinaf, and from there, in appealable cases, to the Court of Cassation through temyiz. The Code of Civil Procedure sets short deadlines, formal petition requirements, limited review rules, and important enforcement consequences. It also gives the BAM broad corrective powers and reserves to Yargıtay a high-level legality review that can end in approval, corrected approval, or reversal.
For litigants and businesses, the main lesson is simple: an appeal in Türkiye is not an afterthought. It is a separate procedural battlefield. The party that understands appealability, calculates deadlines correctly, drafts targeted petitions, coordinates stay strategy with enforcement risk, and distinguishes properly between BAM review and Yargıtay review will almost always stand in a stronger position than the party that treats appeal as a routine formality.
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