The Firm

In today’s world, organizations are facing an increasingly complex landscape of regulations, operational challenges, analytical requirements, and strategic decisions, particularly in the realms of fraud risk management, financial and economic crimes, and ESG (Environmental, Social, and Governance) considerations. Cases involving accusations of financial mismanagement, fraud, bribery, money laundering, corruption, or violations of international sanctions seriously disrupt a client’s operations and damage their reputation.

In this context, Bas A.S. van Leeuwen (LL.M., Esq.), an attorney and forensic auditor specializing in financial and economic criminal law, is known for his dedication to advising clients and providing solutions to challenges in regulation, operational optimization, data analysis, and strategic planning related to fraud risk management, financial and economic crimes, and ESG. With his extensive legal expertise and practical approach, he plays a crucial role in guiding organizations through these complex domains, protecting their interests, and helping them achieve their objectives in a rapidly changing and challenging business environment.

Multidisciplinary and Multidimensional

In the labyrinth of legal intricacies, Attorney Bas A.S. van Leeuwen serves as your guiding compass, navigating the complex interplay of legislation, case law, and legal doctrine. With a steadfast commitment to your cause, he brings to bear his extensive experience and multifaceted expertise, illuminating the path forward with clarity and assurance. Every step of the way, Attorney van Leeuwen ensures that all facets of your legal landscape are thoroughly explored and meticulously considered. With an unwavering dedication to creating sustainable value, he openly shares his wealth of knowledge, empowering you to make informed decisions with confidence. In a world where legal contexts and needs are in constant flux, Attorney van Leeuwen stands as your stalwart ally, steadfastly guiding you towards your desired destination.

Integrity, Authenticity, and Consistency

In a world where change is the only constant, Attorney Bas A.S. van Leeuwen embodies the values of integrity, authenticity, and consistency. With a keen ear attuned to your concerns, he listens intently to what truly matters, offering pragmatic and personalized advice tailored to the ever-evolving landscape. Armed with a fresh perspective, deep insights into emerging technologies, and a wealth of proven experience, Attorney van Leeuwen believes that true opportunities emerge through the sharing of knowledge. Customer-centric and responsive, he communicates openly and honestly in a language that resonates with you, creating meaningful connections that transcend mere legal counsel. In the hands of Attorney van Leeuwen, your legal journey is not just about navigating the present; it’s about creating a future grounded in trust, authenticity, and unwavering consistency.

Criminal Enforcement & Compliance

In the realm of criminal law and regulatory compliance, Attorney Bas A.S. van Leeuwen stands as a beacon of expertise and guidance. Specializing in navigating the complexities of criminal investigations and administrative proceedings within a business context, he offers comprehensive advice and support to entities and individuals alike. From allegations of money laundering to cases of tax fraud, Attorney van Leeuwen brings unparalleled insight and strategic counsel to every matter. Moreover, he provides proactive compliance guidance, helping companies safeguard against unforeseen inspections and regulatory pitfalls. With Attorney van Leeuwen by your side, you can navigate the intricate web of legal challenges with confidence and clarity.

A Targeted Approach for an Effective Result

Amidst the turbulence of global business, Attorney Bas A.S. van Leeuwen offers a strategic and goal-oriented approach to legal representation. In the face of allegations ranging from financial impropriety to misconduct, he serves as a steadfast advocate, guiding clients through the complexities of criminal proceedings and administrative oversight. Focused on addressing issues such as fraud risk management, financial crimes, and ESG concerns, Attorney van Leeuwen leaves no stone unturned in pursuit of effective results. With his unwavering commitment to excellence, clients can trust in his ability to navigate the most intricate legal landscapes with precision and purpose.

Regulatory, Operations, Analytics, and Strategy Challenges

In today’s multifaceted business environment, Attorney Bas A.S. van Leeuwen provides indispensable guidance in navigating the intricate web of regulatory, operational, analytical, and strategic challenges. With a keen understanding of fraud risk management, financial crimes, and ESG considerations, he helps organizations maintain integrity and compliance in an ever-evolving landscape. By preventing and combating fraud and ensuring adherence to ESG standards, Attorney van Leeuwen safeguards the reputation and viability of organizations worldwide. With his strategic counsel, clients can navigate the complexities of modern business with confidence and clarity.

Supporting the Transformation of Clients' Organizations

In an era defined by dynamic change and interconnected challenges, Attorney Bas A.S. van Leeuwen offers comprehensive support in transforming organizations to meet the demands of the modern landscape. With a focus on fraud risk management, financial crimes, and ESG considerations, he provides strategic counsel to navigate complex regulatory, operational, and analytical landscapes. By addressing accusations of financial impropriety and ethical violations head-on, Attorney van Leeuwen helps safeguard the reputation and viability of organizations worldwide. With his holistic approach, clients can embark on a journey of transformation with confidence and conviction.


Van Leeuwen Law Firm operates with transparency and clarity in its billing practices. Through periodic invoicing and detailed statements of fees and costs, clients are kept informed of all financial matters related to their case. Each invoice breaks down the amount due into distinct categories, including fees, administrative costs, court costs, and advances. By providing a clear specification of performed activities and associated costs, Van Leeuwen Law Firm ensures that clients have a comprehensive understanding of their financial obligations throughout the legal process.

Corporate Social Responsibility (CSR)

At Van Leeuwen Law Firm, Corporate Social Responsibility (CSR) is more than just a principle; it’s a guiding ethos that shapes every aspect of our practice. Aligned with the United Nations’ Sustainable Development Goals (SDGs), we are committed to fostering economic progress and sustainable development in all sectors of society. By integrating CSR principles into our operations, we strive to not only advise clients but also contribute positively to the communities we serve. At Van Leeuwen Law Firm, we believe that true success is measured not only by financial prosperity but also by the positive impact we have on the world around us.

Participation in the Subsidized Legal Aid System

As a firm believer in equal access to justice, Attorney Bas A.S. van Leeuwen participates wholeheartedly in the subsidized legal aid system. His dedication to providing accessible legal assistance reflects a deep commitment to social responsibility and the pursuit of justice for all, regardless of financial means. Beyond his professional duties, Attorney van Leeuwen offers guidance and support to families and individuals facing diverse legal challenges, ensuring that no one is left behind in their quest for fair and equitable treatment under the law.

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