Comprehensive Guide to Labor Lawsuits: Procedural Rules, Evidentiary Requirements, and Statute of Limitations Pitfalls

Labor Law is not merely a domain where substantive rights—such as severance pay, notice pay, and overtime wages—are strictly written in codes; it is also a highly procedural branch of law interwoven with the Labor Courts Law No. 7036 and the Civil Procedure Code (HMK) No. 6100. It is never sufficient for an employee or an employer to merely be in the right; this righteousness must be proven before the competent court, within the absolute statutory time limits, and through qualified legal evidence.

As Malgır Law Firm, we deconstruct the complete anatomy of labor lawsuits—from mandatory mediation to technical expert evaluations, and from strict witness protocols to specific interest rate categories.

1. Condition Precedent: Mandatory Mediation and the Enforcement Clause

Since 2018, applying to a mediator is an absolute condition precedent (dava şartı) prior to filing a lawsuit regarding employee or employer receivables, statutory indemnities, or reinstatement requests. In the event that a lawsuit is initiated directly without prior application to a mediator, the court shall render a procedural dismissal (usulden ret) without reviewing the substantive merits of the case.

Execution of Unpaid Amounts Upon Settlement:

Suppose that the parties reached an agreement during the mediation hearings, the official minutes were signed, but the employer subsequently failed to execute the agreed payment. These signed minutes legally possess the nature of a court judgment (ilam). However, to subject this document directly to enforcement proceedings, it is bound by a specific statutory requirement: the Enforcement Enforceability Clause (İcra Edilebilirlik Şerhi).

• This clause must be requested from the Civil Court of Peace (Sulh Hukuk Mahkemesi) of the venue where the primary dispute would be heard.

• Critical Statutory Exception: Pursuant to Article 18 of Law No. 6325, if the mediation settlement agreement is signed jointly by the employee, the employer, the attorneys of both parties, and the mediator, there is no requirement to obtain an enforcement enforceability clause from a court. This document can be directly subjected to enforcement proceedings with judgment (ilamlı icra takibi), exactly like a final court decree.

2. Statutes of Limitations and Statutory Forfeiture Periods

Timeframes in labor legislation are split into two distinct categories. This domain constitutes the most frequent source of legal error for citizens:

• Statutory Forfeiture Period (Işe İade Davaları / Reinstatement Lawsuits): An employee whose contract has been terminated must apply to the mediator within 1 month from the date the notice of termination is served, asserting the invalidity of the termination and requesting reinstatement. If mediation fails, the lawsuit must be filed before the Labor Court within 2 weeks from the date the final minutes of non-settlement are issued. These timeframes are absolute; missing them by even a single day results in the permanent forfeiture of the right to request reinstatement.

• Statutes of Limitations (Alacak Davaları / Receivables Lawsuits): Following legislative amendments enacted in 2017, the statute of limitations for labor receivables was reduced to 5 years. Statutory severance pay, notice pay, unused annual leave compensation, overtime wages, weekly rest day wages, and public holiday (UBGT) pay undergo statutory limitation if they are not judicially claimed within 5 years from the date the right accrued (which is generally the exact date of termination).

3. Categories of Statutory Interest Rates Applied to Specific Receivables

The interest rates to be executed upon the financial amounts calculated at the conclusion of the lawsuit vary strictly according to the specific category of the receivable:

• Statutory Severance Pay: Subjected to the highest bank deposit interest rate applied to term deposits (mevduata uygulanan en yüksek faiz), calculated retroactively from the exact date of termination.

• Wage Receivables (Salary, Overtime, UBGT, etc.): Subjected to the highest bank deposit interest rate, calculated from the exact date the specific receivable became due and payable (muacceliyet tarihi).

• Notice Pay: Subjected to standard legal interest (yasal faiz), running from the date of default (temerrüt) or the date of mediation/lawsuit.

• Unused Annual Leave Pay: Subjected to standard legal interest, running from the date of default or the date the lawsuit was initiated.

4. Court of Subject-Matter Jurisdiction, Venue, and Trial Procedures

• Subject-Matter Jurisdiction: The competent courts are the Labor Courts (İş Mahkemeleri). In jurisdictions where a specialized labor court is not established, the Civil Courts of First Instance (Asliye Hukuk Mahkemeleri) hear these files under the explicit capacity of a Labor Court.

• Venue (Territorial Jurisdiction): The competent venue is the court of the domicile of the defendant natural or legal person at the date the lawsuit is initiated, or the court where the actual work was performed or the transaction was executed.

• Trial Procedure (Simplified Trial / Basit Yargılama): Pursuant to the HMK, the "Simplified Trial Procedure" is executed before the labor courts. The most critical consequence of this procedure is as follows: the plaintiff submits a petition for lawsuit, the defendant submits a statement of defense within 2 weeks, and the pleading phase is permanently concluded. Unlike the written trial procedure, there are no sur-replications (cevaba cevap / replik) or rejections of sur-replications (ikinci cevap / düplik). Consequently, an employee or an employer must present all claims, defenses, and evidence in full within their initial pleadings. Expanding claims or defenses at a later stage is strictly prohibited under the law.

5. Evidence, Burden of Proof, and Vital Witness Protocols

As a general rule in labor lawsuits; the employee bears the burden of proving that they performed work, executed overtime hours, or worked on public holidays. Conversely, the employer bears the burden of proving that the employee's wages were fully paid, annual leaves were utilized, or that the contract was terminated summarily for just cause under Article 25.

A. Documentary Evidence (Signed Payrolls and Reservations)

If the salary payrolls (maaş bordroları) submitted by the employer bear the wet or electronic signature of the employee, it creates a legal presumption (karine) that the overtime or holiday wages for that specific month were paid. However, if the employee added a handwritten statement next to their signature stating "My overtime rights are reserved" (ihtirazi kayıt), that payroll loses its character as conclusive evidence, and the employee legally regains the right to present witness testimony to prove the contrary for those specific months.

B. Strict "Employee Witness" Criteria of the Court of Cassation

Overtime hours and specific working conditions are generally proven via oral witness testimony. However, the statements of just any witness are not deemed credible by the courts. The Court of Cassation mandates strict criteria regarding employee witnesses:

1. Contemporaneous Employment Requirement: The witness must have been employed at the exact same workplace during the specific timeframes and periods claimed by the plaintiff employee. Testimony regarding periods during which the witness did not personally work at the premises is excluded from the calculation.

2. The Hostile Witness Rule (Husumetli Tanık): A judgment cannot be established solely based on the testimony of a witness who has an ongoing active lawsuit against the same employer or who harbors an explicit hostility toward the employer. Hostile witness testimonies are legally valid only if they are corroborated by auxiliary evidence, such as unsigned time-card records (puantaj) or another independent, non-hostile witness.

3. Physical Co-Presence: It is insufficient for the witness to merely be employed by the same corporate entity. If, in a large factory complex, the plaintiff worked out on the field while the witness performed duties inside the accounting office, the Court of Cassation presumes that the witness is not in a position to personally know the overtime hours of the plaintiff, and their testimony is dismissed.

6. Technical Expert Evaluations and the "Amendment of Claim" Mechanic

Labor lawsuits are highly technical actions requiring specialized financial computations. Once witnesses are heard and evidence is collected, the file is referred to a specialized Labor Law Expert Witness (İş Hukuku Bilirkişisi) for the mathematical calculation of the receivables.

• Equity Deduction (Takdiri İndirim): If the overtime receivables are calculated based solely on oral witness testimonies rather than objective written documentation, the court—pursuant to settled Court of Cassation jurisprudence—applies an equity reduction, typically at a ratio of 30%, over the calculated gross amount.

• Amendment of Claim / Value Increase (Islah / Bedel Artırımı): Labor actions are frequently initiated as unliquidated claims (belirsiz alacak davası) or partial claims (kısmi dava) with a nominal amount (e.g., $1,000 \text{ TL}$). When the expert evaluation report liquidates the true amount to a higher figure (e.g., $150,000 \text{ TL}$), the plaintiff submits a petition for the "Amendment of Claim" (Islah) or a value increase, completes the remaining state court fees, and obtains a final judgment over the full liquidated amount.

Conclusion

Labor Law is a technical arena where strict procedural rules operate decisively, rather than the subjective good faith of the parties. Lawsuits initiated with the casual assumption of "I am right, so I will naturally win" frequently result in frustration due to incorrect interest requests, flawed witness selection, or missing the mandatory 2-week absolute deadlines.

With our legal team commanding the most intricate procedural details of the HMK and the Labor Courts Law, Malgır Law Firm strategically manages the corporate risks of employers while securely guaranteeing the lawful remuneration of employees before the judiciary.