Iwona Terlecka specialises in both Polish and European competition law. Iwona's clients include some of the largest foreign corporations operating in Poland.
College of Europe, Belgium, LLM (Master of European Law) 1994
Joined Clifford Chance 1995
Admitted as an attorney-at-law (radca prawny) in Poland 1999
Professional bodies
Member of the Warsaw Bar Association (OIRP w Warszawie)
Member of the Board of the Polish Competition Law Association
Awards and citations
"Iwona Terlecka moves into the top tier of the rankings on the back of her broad competition law practice that covers both behavioural and merger control mandates. She has notable experience representing clients in investigations into alleged cartels and other unfair commercial practices, as well as acting on subsequent appeals and private enforcement actions." Chambers Europe 2026: Competition/Antitrust – Poland
"One of the most experienced competition lawyers in Poland, Iwona Terlecka is clear and coherent in strategic scenarios. She has deep knowledge and explains her view in a straightforward way. She listens carefully and is open for a dialogue." Chambers Europe 2026: Competition/Antitrust – Poland
"She is one of the most competent lawyers we work with." Chambers Europe 2026: Competition/Antitrust – Poland
"We appreciate her pro-business advice and pragmatic approach." Chambers Europe 2026: Competition/Antitrust – Poland
"Iwona Terlecka is the best-in-class competition lawyer with deep business knowledge." Chambers Europe 2026: Competition/Antitrust – Poland
"She is a top competition lawyer in Poland." Chambers Europe 2026: Competition/Antitrust – Poland
" I greatly value her experience, proactiveness and strategic approach. She has always had a good balance between keeping the client on the safe side while searching for creative solutions." Chambers Europe 2024: Competition/Antitrust – Poland
"Iwona’s attitude to the case and the client is above expectation." Chambers Europe 2024: Competition/Antitrust – Poland
"She combines in-depth knowledge of Polish regulations with an understanding of our business." Chambers Europe 2024: Competition/Antitrust – Poland
