The concept of "Hizmet Tespiti" (Service Determination) is a cornerstone of Turkish Labor and Social Security Law, serving as a vital mechanism for employees to officially establish the existence and duration of their employment relationship, particularly when it has been unregistered or under-registered by their employer. This legal action is crucial for safeguarding fundamental employee rights, ensuring access to social security benefits, and upholding the principles of social justice. Without a formal record of employment, workers are deprived of their right to retirement, health insurance, unemployment benefits, and other social security entitlements, making the Hizmet Tespiti lawsuit an indispensable tool for rectifying such injustices.

Legal Framework and Purpose

The primary legal basis for Hizmet Tespiti lawsuits is found in the Social Security and General Health Insurance Law (Sosyal Sigortalar ve Genel Sağlık Sigortası Kanunu) No. 5510, specifically Article 79. This article mandates employers to notify the Social Security Institution (Sosyal Güvenlik Kurumu - SGK) about the commencement of employment for their workers. When an employer fails to comply with this obligation, or registers the employee for fewer days or a lower wage than actually worked, the employee is granted the right to file a Hizmet Tespiti lawsuit to seek judicial determination of their actual employment status.

Sosyal Sigortalar ve Genel Sağlık Sigortası Kanunu No. 5510, Madde 79/10: "Sigortalıların işe giriş bildirgelerinin süresinde verilmemesi halinde, sigortalılar, çalıştıkları süreleri hizmet tespiti davası açarak tespit ettirebilirler. Bu davalar, hizmetin geçtiği yılın sonundan başlayarak beş yıl içinde açılabilir."

(Social Security and General Health Insurance Law No. 5510, Article 79/10: "In cases where the employment entry declarations of insured persons are not submitted on time, insured persons may have their periods of employment determined by filing a service determination lawsuit. These lawsuits may be filed within five years starting from the end of the year in which the service took place.")

The overarching purpose of these lawsuits is to ensure that all individuals working under an employment contract are registered with the SGK, thereby guaranteeing their social security rights. This not only protects the individual worker but also contributes to the financial sustainability of the social security system and combats informal employment, which is a significant challenge in many economies, including Turkey.

Conditions for Filing a Hizmet Tespiti Lawsuit

For a Hizmet Tespiti lawsuit to be successful, several key conditions must be met:

1. Existence of an Employment Relationship: The plaintiff must prove that they were employed under a service contract (iş sözleşmesi) as defined by Turkish Labor Law (İş Kanunu No. 4857) and the Turkish Code of Obligations (Türk Borçlar Kanunu No. 6098). The essential elements of a service contract are the performance of work, payment of wages, and subordination to the employer. The element of subordination (bağımlılık) is particularly crucial, distinguishing an employee from an independent contractor.
2. Unregistered or Under-Registered Service: The core of the claim is that the employer either did not register the employee with the SGK at all, or registered them for a shorter period or lower wage than their actual work.
3. Compliance with the Time Limit (Hak Düşürücü Süre): This is a critical procedural requirement. As per Law No. 5510, Article 79, the lawsuit must be filed within five years from the end of the calendar year in which the alleged unregistered service took place. This five-year period is a "hak düşürücü süre" (preclusive period), meaning it is an absolute deadline that the court must observe ex officio. If the lawsuit is filed after this period, it will be dismissed on procedural grounds, regardless of the merits of the claim.

Parties to the Lawsuit and Jurisdiction

The parties involved in a Hizmet Tespiti lawsuit are typically:

• Plaintiff: The employee (sigortalı) who claims to have worked unregistered or under-registered.
• Defendants: The employer (işveren) who failed to register the employee, and the Social Security Institution (SGK), which must be a party to all such lawsuits as its rights and obligations are directly affected by the outcome.

Hizmet Tespiti lawsuits fall under the jurisdiction of the Labor Courts (İş Mahkemeleri). If there is no specific Labor Court in a particular location, the Civil Courts of First Instance (Asliye Hukuk Mahkemeleri) act as Labor Courts.

Evidentiary Principles and Burden of Proof

The burden of proof in a Hizmet Tespiti lawsuit primarily rests with the employee. They must present compelling evidence to demonstrate the existence and duration of their employment relationship. However, the Turkish High Court (Yargıtay) has adopted a flexible approach to evidence, recognizing the inherent difficulty for employees to obtain formal documentation in unregistered employment scenarios. Therefore, while written evidence is preferred, other forms of evidence are also highly valued:

• Witness Testimony: This is often the most crucial evidence. Witnesses (co-workers, neighbors, customers, suppliers) who can credibly attest to the plaintiff's presence and work at the employer's workplace are vital. Yargıtay consistently emphasizes the importance of objective and convincing witness statements.
• Employer's Records: Payrolls, attendance records, social security declarations for other employees, and internal documents can be used. The absence of such records for the plaintiff can also be indicative.
• Official Records: Police reports, tax records, or other official documents that might indirectly indicate the plaintiff's employment.
• Expert Reports: The court may appoint experts to analyze financial records, production reports, or other data to infer the plaintiff's involvement in the business.
• On-site Inspections (Keşif): Courts often conduct on-site inspections of the workplace to gather firsthand observations and interview individuals.

Yargıtay 21. Hukuk Dairesi, E. 2018/2753, K. 2019/3358, T. 06.05.2019: "Hizmet tespiti davaları kamu düzenini ilgilendirdiğinden, mahkemece resen araştırma ilkesi uygulanmalı, davacı lehine deliller toplanmalı ve değerlendirilmelidir. Özellikle tanık beyanları, davacının işyerinde çalışıp çalışmadığına dair önemli bir kanıt niteliğindedir."

(Turkish High Court, 21st Civil Chamber, File 2018/2753, Decision 2019/3358, Date 06.05.2019: "Since service determination lawsuits concern public order, the court should apply the principle of ex officio investigation, collect and evaluate evidence in favor of the plaintiff. Especially witness statements are important evidence regarding whether the plaintiff worked at the workplace.")

The Yargıtay consistently holds that the court must conduct a comprehensive investigation, going beyond the evidence presented by the parties, to uncover the material truth due to the public order nature of these cases.

Exceptions to the Five-Year Time Limit

While the five-year preclusive period is generally strict, the Yargıtay has recognized certain exceptions:

• SGK's Own Determination: If the SGK itself determines through its inspections or investigations that an employee worked unregistered, the time limit does not apply, and the service period will be registered.
• Criminal Conviction of the Employer: If an employer is criminally convicted for failing to register an employee, the service period can be registered without being subject to the five-year limit.
• Certain Types of Work: For specific types of work, such as construction work or certain agricultural jobs, where the SGK has alternative methods of determining employment, the time limit might be interpreted differently or not applied.

Legal Consequences of a Successful Lawsuit

A successful Hizmet Tespiti lawsuit carries significant legal ramifications:

• Retrospective Registration: The employment period determined by the court is retrospectively registered with the SGK, as if the employer had fulfilled their obligations from the start.
• Premium Calculation and Payment: The employer becomes liable for all unpaid social security premiums (including employer and employee shares, along with late payment penalties and interest) for the determined period.
• Access to Social Security Benefits: The employee gains access to all social security benefits associated with the registered period, including retirement (old-age, disability), health insurance, and unemployment benefits. This is often the primary motivation for filing such a lawsuit.
• Basis for Other Labor Claims: A successful Hizmet Tespiti judgment provides a solid foundation for employees to pursue other labor law claims, such as severance pay (kıdem tazminatı), notice pay (ihbar tazminatı), annual leave pay (yıllık izin ücreti), and overtime wages, as the existence and duration of the employment relationship are now legally established.

Challenges and Practical Considerations

Despite its importance, Hizmet Tespiti lawsuits can be challenging. Employees often face difficulties in proving unregistered work, especially when employers maintain no formal records or when witnesses are reluctant to testify. Employers may also raise various defenses, such as claiming the plaintiff was an independent contractor, a family member working without pay, or never worked for them. Therefore, meticulous preparation, gathering all available evidence (even seemingly minor details), and securing credible witness testimony are crucial for the plaintiff's success.

Conclusion

Hizmet Tespiti lawsuits represent a critical legal avenue in Turkish Labor and Social Security Law, empowering employees to assert their fundamental rights against employers who fail to comply with social security obligations. By enabling the judicial determination of unregistered or under-registered employment, these lawsuits ensure that workers can access the social safety net intended to protect them throughout their working lives and into retirement. The robust legal framework, coupled with the High Court's emphasis on thorough investigation and a flexible approach to evidence, underscores Turkey's commitment to combating informal employment and upholding the principles of social justice and employee protection.