Lawyers Dr. iur. Onur Ergönen

Dr. iur. Onur Ergönen

Dr. iur. Onur Ergönen

Acar & Ergönen Attorney Partnership

Onur Ergönen successfully completed his law degree at Istanbul University Faculty of Law, following his graduation from Istanbul Private German High School. Subsequently, he pursued doctoral studies at the Institute of Foreign Law and International Private Law, within the Faculty of Law at the University of Cologne. His research culminated in the awarding of the degree of Doctor Iuris ("Doctor of Law") with magna cum laude distinction in 2014. His doctoral thesis, titled "Turkish Arbitration Law and the Role of Turkish Courts in National and International Arbitration," was published as a book by the esteemed German publishing house Mohr Siebeck in December 2022.

He specializes in dispute resolution and serves as an accomplished legal practitioner in this domain. He effectively represents domestic and international clients before mediators, courts, and arbitration tribunals in various types of disputes arising from diverse areas of private and administrative law, especially in commercial law, contracts law, mergers and acquisitions, construction and real estate law, labour law, intellectual property law, administrative and tax law matters. He also renders comprehensive legal consultancy services, with a focus on the aforementioned areas of expertise.


Practice Areas & Work Department

Dispute Resolution

Construction and Real Estate

Contracts

Enforcement and Bankruptcy

Commercial and Corporate


Languages

English

German


Memberships

Istanbul Bar Association

Anayasa Mahkemesi, Hukuk Muhakemeleri Kanunu’nun 166. Maddesinin 1. Fıkrası Kapsamında Verilen Birleştirme Kararlarının Bağlayıcı Olduğuna Dair Hükmü İptal Etti

Anayasa Mahkemesi, 17.06.2025 tarihli kararıyla, 6100 Sayılı Hukuk Muhakemeleri Kanunu’nun 166. maddesinin 1. fıkrasında yer alan, “bağlantılı davalarda birleştirme kararını veren ikinci mahkemenin diğer mahkemeyi bağlayacağı” ...

09.10.2025

The Constitutional Court Annulled the Provision under Article 166/1 of the Code of Civil Procedure Regarding the Binding Nature of Consolidation Decisions Rendered by the Second Court

By its decision dated 17 June 2025, the Constitutional Court of Turkey annulled the rule set forth under Article 166/1 of the Code of Civil Procedure No. 6100 (“CPC”), which provided that “in related cases, the decision on consolidation rendered by the second court shall be binding on the other court.”

09.10.2025

Rekabet Yasağı Anlaşmasına Aykırılık Sebebiyle Açılacak Davalarda Görevli Mahkemenin Asliye Ticaret Mahkemesi Olacağı Hususunda İçtihadı Birleştirme Kararı Yayımlandı

Karar’da, Türk Borçlar Kanunu’nun 444 ila 447. maddeleri kapsamında rekabet yasağına aykırılık nedeniyle açılacak davalarda görevli mahkemenin asliye ticaret mahkemesi olduğuna hükmedildi.

16.09.2025

Publication of the Decision of the Council on the Unification of Judgments of the Court of Cassation Regarding the Competent Court in Lawsuits Arising from Breach of Non-Compete Agreements

The decision numbered 2023/1 E., 2025/3 K. (“Decision”) of the Council on the Unification of Judgments of the Court of Cassation was published in the Official Gazette dated 12 September 2025 and numbered 33015.

16.09.2025

Foreign Currency Payments Allowed Again for Movable Sales

The Communiqué No. 2025-32/72, prepared to amend the Communiqué on Decree No. 32 on the Protection of the Value of Turkish Currency (Communiqué No. 2008-32/34), was published in the Official Gazette No. 32833 on 06.03.2025 and has entered into force.

10.03.2025

Anayasa Mahkemesi, İstinaf ve Temyize İlişkin Parasal Sınırların Uygulanmasında Dava Tarihinin Esas Alınması Gerektiğine Hükmetti

Anayasa Mahkemesi 30.01.2025 tarihli ve 32798 sayılı Resmî Gazete’de yayımlanan 04.12.2024 tarihli kararıyla istinaf ve temyize ilişkin parasal sınırların uygulanmasında hükmün verildiği tarihteki tutarın esas alınmasını öngören kuralın Anayasa’ya aykırı olduğuna karar vermiştir.

16.02.2025

The Constitutional Court Ruling About the Application of Monetary Thresholds for Appeal and Cassation

The Constitutional Court, in its decision dated December 12, 2024, which was published in the Official Gazette on January 1, 2025 under issue number 32798, ruled that the provision stipulating that the amount in effect on the date of the ruling should be taken as the basis for the application of monetary thresholds for appeal and cassation is unconstitutional.

16.02.2025

The Right to Compensation Granted to Airline Passengers in Cases of Cancellation Has Been Extended to Delays

The Regulation on the Rights of Passengers Traveling by Air (SHY-YOLCU) was amended by the Regulation Amending the Regulation on the Rights of Passengers Traveling by Air, which was published in the Official Gazette numbered 32748 on 10.12.2024, and entered into force.

30.12.2024
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