Businesses operating across Canada and the United States can face complex disputes involving multiple legal systems, jurisdictions, and enforcement procedures. Ruzbeh Hosseini advises corporations, business owners, and international clients on Canada-U.S. commercial disputes, jurisdictional issues, foreign judgment enforcement, and coordinated cross-border litigation strategies.

Types of Cross-Border Disputes Handled
Ruzbeh advises businesses and individuals involved in disputes that extend beyond a single jurisdiction. His practice includes strategic representation in matters involving Canadian and international parties, assets, and contractual relationships.
Services include:
- Cross-border commercial litigation
- International contract disputes
- Jurisdictional challenges
- Shareholder and business disputes involving Canadian and U.S. parties
- Recognition and enforcement of foreign judgments
- Enforcement of international arbitral awards
- Coordination with foreign legal counsel
Canada-U.S. Litigation Coordination
Commercial disputes involving Canadian and U.S. businesses often require coordinated legal strategies across jurisdictions. Ruzbeh works with companies, shareholders, and foreign counsel to manage litigation efficiently and protect clients' commercial interests.
His approach focuses on:
- identifying the appropriate jurisdiction
- reducing procedural delays
- coordinating legal strategy across borders
- protecting commercial interests throughout the dispute
Foreign Judgments and Arbitral Awards
Businesses may need to enforce a foreign court judgment or international arbitral award against assets located in Ontario.
Ruzbeh advises clients on the recognition and enforcement process, helping them understand jurisdictional requirements, procedural obligations, and practical enforcement options under Ontario law.
A Strategic Approach to Cross-Border Disputes
Cross-border litigation requires more than knowledge of substantive law. It demands careful planning, jurisdictional analysis, and effective coordination between legal teams.
Clients benefit from:
- 17+ years of commercial litigation experience
- Partner at Cambridge LLP
- Qualified Arbitrator (Q.Arb.)
- Experience appearing before Ontario courts
- Practical, commercially focused dispute resolution strategies
Frequently Asked Questions
Yes. Ontario generally recognises and enforces international arbitral awards where legislative requirements have been met. The enforcement process depends on the applicable arbitration legislation and the specific circumstances of the award.
Parallel proceedings can create procedural complexity, increased costs, and inconsistent outcomes. Courts may consider issues such as jurisdiction, forum appropriateness, and judicial efficiency when determining how the matters should proceed.
The appropriate forum depends on several factors, including contractual jurisdiction clauses, governing law provisions, where the dispute arose, and where enforcement may ultimately be required. Early legal advice can help determine the most effective venue.
In many cases, yes. Ontario courts may recognise and enforce U.S. judgments if legal requirements are satisfied. The process depends on factors such as the originating jurisdiction, procedural fairness, and applicable Ontario law.
Not always. The answer depends on where the dispute is being litigated, where the parties and assets are located, and whether proceedings may be required in more than one jurisdiction. In many matters, Canadian counsel works closely with U.S. lawyers to coordinate strategy efficiently
Discuss Your Cross-Border Dispute
Cross-border disputes require practical legal strategies that account for multiple jurisdictions, commercial objectives, and enforcement considerations.
Whether your matter involves Canadian and U.S. businesses, foreign judgments, international contracts, or arbitration, Ruzbeh Hosseini provides strategic representation focused on resolving complex commercial disputes efficiently.
Passionate – Dedicated – Professional

