Skip to main content

Clifford Chance

Clifford Chance
Iwona Terlecka

Iwona Terlecka


Iwona Terlecka

Iwona Terlecka specialises in both Polish and European competition law. Iwona's clients include some of the largest foreign corporations operating in Poland.

Contact details

Career and qualifications

  • Silesian University, Poland (Master of Law) 1993
  • College of Europe, Belgium, LLM (Master of European Law) 1994
  • Joined Clifford Chance 1995
  • Admitted as a legal adviser (radca prawny) in Poland 1999

Professional bodies

  • Member of the Board of the Polish Competition Law Association

Awards and citations

  • Iwona Terlecka enters the top tier on the back of substantial endorsements and support across the legal market. One client reveals that she has a "great attitude to clients," while another one appreciates that "she links the legal knowledge and practical experience together well."
    Chambers Europe 2019, Competition/Antitrust – Poland
  • Iwona Terlecka heads the competition and antitrust practice and is well regarded for her wide knowledge of competition law issues, which includes both Polish and EU law matters. Clients praise her "great knowledge and pro-business approach." She has practical experience of cartel investigation cases and also assists with cross-border merger clearance mandates. 
  • Chambers Europe 2017
  • Clients praise Iwona Terlecka for being "very pro-business and trying to understand the background and circumstances," and add: "She knows what to look for and is able to measure and evaluate processes that will be problematic." Alongside local antitrust issues, she has key knowledge of EU competition law.
    Chambers Europe 2016
  • Practice head Iwona Terlecka "is a wonderful lawyer," according to impressed sources. Terlecka has considerable experience of merger control matters and also advises on leniency applications and cartel cases. She advised Pfizer on securing clearance for its acquisition of Polocard from Polpharma.
    Chamber Europe 2015
  • Iwona Terlecka remains at the forefront of the Polish legal market for competition-related mandates, with sources highlighting her many years of experience advising in this field. Her area of expertise extends to European competition law.
    Chambers Europe 2014