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Now advising on the UK Data (Use and Access) Act 2025 · cross-border transfers & automated decisions
International Legal Counsel · UK · Türkiye · US

Cross-border matters, resolved with authority.

Legal problems rarely respect borders. We advise businesses and individuals across the United Kingdom, Türkiye and the United States on cross-border disputes, data protection and IP, with the depth of scholars and the instincts of practitioners.

Book a Consultation Explore Expertise
3
Jurisdictions
10+
Years
30+
Publications
3
Bar Admissions
Dr Gizem Halis Kasap
Dual-QualifiedNew York & Istanbul Bars · Doctorate in Law
New York Bar Istanbul Bar Doctorate in Law GDPR & KVKK Turkish & English
Expertise

What we do

Nine focused practice areas at the intersection of international law, technology and cross-border life.

01

Cross-Border Litigation & Disputes

Multi-jurisdictional dispute strategy, enforcement of foreign judgments and coordinated proceedings across the United Kingdom, Türkiye and the United States.

02

Data Protection & DPO

GDPR and KVKK compliance, international data transfers under the United Kingdom's 2025 reforms, and outsourced or fractional DPO cover.

03

IP, Technology & AI

Cross-border intellectual property strategy, copyright in the age of generative AI, and research-led advice on emerging technology regulation.

04

Turkish Law Expert Opinions

Independent written opinions and expert-witness evidence on Turkish law for English courts, tribunals and law firms.

05

Private International Law

Which country's law applies, and which court has jurisdiction? We answer the questions that decide cross-border cases before they begin.

06

Corporate & Contracts

Drafting, review and negotiation of international agreements, cross-border company formation and structuring for United Kingdom-Türkiye operations.

07

Representation & Case Management in Türkiye

Coordinated court proceedings and official, administrative and notarial matters in Türkiye, handled with vetted local counsel and reported to you in English at every step.

08

Translation & Interpreting

Turkish and English legal translation and interpreting for documents, contracts and hearings.

09

Arbitration & Mediation

Advisory and representation in commercial arbitration under ICC, LCIA and ISTAC rules, with support through mediation and other ADR processes.

Our Approach

Clarity, then resolution

A disciplined path from first conversation to lasting outcome, built on academic rigour and commercial judgement.

01

Assess

We map the legal terrain across every relevant jurisdiction and define the real objective.

02

Advise

Clear, written strategy that weighs risk, cost and the commercial reality you face.

03

Resolve

Representation and expert input through negotiation, litigation or arbitration.

04

Protect

Compliance, contracts and safeguards that keep the outcome durable long after the matter closes.

3
Jurisdictions Bridged
2
Doctorates in Law
30+
Scholarly Publications
10+
Years of Practice
The Counsel

A deliberately small team, senior by design

Real practitioners and academics, not a switchboard. You work directly with the people whose names are on the door.

Dr Gizem Halis Kasap

Dr Gizem Halis Kasap

Founder & Principal Counsel
Attorney (New York & Istanbul) · Doctorate in Law

A decade advising multinationals and private clients on cross-border disputes, data protection and international strategy. Practical, tailored counsel, grounded in internationally published research.

Dr Atilla Kasap

Dr Atilla Kasap

Counsel
Attorney (Istanbul) · Doctorate in Law

Author and editor of three books, including Autonomous Vehicles (Edward Elgar), with over a dozen further publications on IP, AI and technology regulation. Research funded by the Japan Patent Office, and expert consultant to Türkiye's leading telecoms.

Why Clients Choose Us

The difference is the vantage point

Dual-qualified authority

Admission in New York and Istanbul plus a doctorate means we read a cross-border problem from both sides at once.

Academic depth, commercial judgement

Published research grounds our advice, but every recommendation is measured against your commercial reality.

One team across borders

Turkish and English, law and language, strategy and execution, handled by the same people from start to finish.

Insights

Selected publications

Our counsel is grounded in peer-reviewed research across privacy and data protection, technology and private international law.

Questions

Good to know

Do you act for individuals as well as businesses?

Yes. Alongside corporate clients, we regularly advise individuals on Türkiye-related and cross-border personal legal matters.

Do you offer outsourced data protection support?

Yes. We provide GDPR and KVKK advisory, guidance on international data transfers under the United Kingdom's 2025 reforms, and outsourced or fractional Data Protection Officer cover for businesses operating between the United Kingdom and Türkiye.

Can you give an expert opinion on Turkish law for a United Kingdom matter?

Yes. We prepare independent written opinions and expert-witness evidence on Turkish law for English courts, tribunals and law firms, covering commercial, civil and enforcement questions.

Where are you based and how do we start?

We are based in the United Kingdom and work remotely and internationally. The simplest first step is to book a consultation through the form below, describing your matter in a few lines. You will always have a clear written quote before any work begins.

Let's talk about your matter.

A short, confidential conversation is the fastest way to understand your options across jurisdictions.

Book a Consultation
Get in Touch

Start the conversation

Email

info@halisandkasap.com

Location

71-75 Shelton Street, Covent Garden, London WC2H 9JQ · advising worldwide