Konstantina Theodosaki

Konstantina’s practice mainly focuses on civil and contractual matters, data privacy, trademark protection and regulatory compliance. Konstantina specializes in a broad spectrum of corporate work with particular experience in commercial transactions, corporate governance, deals including strategic alliances (joint venture agreements) and due diligence checks.  She has particular expertise in regulatory compliance including data protection (AEOI and GDPR), cross-border tax compliance (CRS and FATCA) and telecommunications and energy-efficiency regulations. Further, she advises on consumer protection law with a focus on product liability cases. She has also been involved in international commercial arbitration and investment dispute settlement cases.

Previously, Konstantina has acted as the head legal advisor to a Greek bank active in the ship-financing scene. She has also advised a Greek Telecommunications Company and has successfully represented it before Greek courts in legal claims arising from the construction of new towers or collocation of antennas on existing structures and the operation of the latter. She has served as an Official Consultant of the European Commission (DG GROW) which allowed her to become actively involved in the Commission’s Proposal for a Regulation on cross-border parcel delivery services.

Konstantina’s interdisciplinary background with an emphasis in disruptive innovation enables her to handle the multidimensional challenges of European and international business and law and offer commercially aware, sophisticated and pragmatic solutions.

Recent highlights include:

  • Acted for SONY LIMITED on a product liability case.
  • Advised HUGO BOSS HELLAS LLC on various aspects of its commercial activities, trademark protection and GDPR compliance.
  • Represented franchisee in a multi-million claim against a leading Greek telecommunication service provider for anti-competition practices.
  • Member of the legal team that represented VOLKSWAGEN AG and AUDI AG before Greek courts in relation to the diesel emissions matter.
  • Member of the legal team that successfully represented Mytilineos Holdings in a bilateral investment treaty dispute against Serbia under the UNCITRAL Arbitration Rules.

Konstantina speaks Greek, English, French, German, Spanish and Dutch.


“Legal concerns emerging from Influencer Marketing – #Sponsored” (August 2018), Lexology https://www.lexology.com/library/detail.aspx?g=0a8df00c-3831-4cf1-a994-477bb182abdf

“Legal developments call for investments In Greece –  “Golden Visa” revisited” (July 2018), Moussas and Partners official site, http://www.moussaspartners.gr/legal-developments-call-for-investments-in-greece-golden-visa-revisited/

“GDPR – An Overview” (May 2018), Moussas and Partners official site, http://www.moussaspartners.gr/gdpr-an-overview/

“Structured guide to product liability in Greece” (Mar. 2018) Lexology https://www.lexology.com/library/detail.aspx?g=9651b2a5-aee2-4fec-a07f-0a34dd38b0aa;

 “Bitcoin and cryptocurrencies – an overview”, (Feb. 2018) Lexology   https://www.lexology.com/library/detail.aspx?g=313c194d-a26d-4705-b3d3-646f58287377 and Capital.gr http://www.capital.gr/me-apopsi/3272145/bitcoin-kai-kruptonomismata;

“Airbnb from a legal perspective”, Touristiki Agora Magazine (Oct.-Nov.-Dec. 2015) Issue 266. p. 78-81, http://www.e-compupress.gr/showmag.asp?ID=5;