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London

Founded in 2012, Signature Litigation has grown into one of London’s pre-eminent specialist dispute resolution practices. From the outset, we set out to do things differently: a conflict-free, disputes-only platform designed to give clients the undivided focus and strategic agility that complex, high-stakes matters demand.

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Gibraltar

Established in 2017, Signature Litigation's Gibraltar office was founded to address growing demand for specialist expertise in commercial litigation and private wealth disputes on the Rock.

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Paris

Signature Litigation AARPI houses one of France’s most enviable product liability practices, with the team also handling commercial and corporate litigation, insurance and reinsurance, toxic tort and ESG, civil fraud and asset tracing, international arbitration, administrative and public law.

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Frankfurt

Frankfurt has emerged as one of Europe's foremost financial and commercial centres and, increasingly, as a bridge between European and Asian markets. With that growth comes an increasing demand for sophisticated dispute resolution. Signature Litigation established its Frankfurt office to meet this need, bringing our conflict-free, disputes-only platform to the German market.

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International Arbitration

“The team is hugely experienced and practical when it comes to analysing and developing strategies, and second to none in implementing thoughtful and highly-effective disputes strategies.”

The Legal 500 UK 2025, International arbitration

Signature’s International Arbitration team comprises industry and region specialists who are expert at handling the most challenging and complex high-value cross-border arbitrations.

Founded originally as a predominantly litigation practice, Signature quickly established itself on the London arbitration market. Signature’s International Arbitration practice is a powerful and comprehensive service handling the most high-stakes, strategically significant cross-border arbitration proceedings which are of strategic importance to our clients. Our International Arbitration team operates as a cohesive unit with a collective commitment to provide the best service to our clients, which reflects Signature’s unique culture.

Our International Arbitration practice spans our offices in London, Paris, and Frankfurt. Many of our partners dedicate their practice solely to international arbitration, while others practice it alongside their litigation expertise. We have strong experience across a broad range of industry sectors and geographical markets, and we are equally capable of handling complex commercial arbitration disputes, as well as investment treaty disputes. We also have significant experience in public international law.

Our key geographical markets are MENA, Sub-Saharan Africa, Eastern and Central Europe including CIS, Southeast Asia and Central Asia, Brazil, and the Balkans.

Our key industry sectors are energy (traditional and renewable); mining & natural resources; commodities; corporate/finance disputes (particularly M&A and involving corporate structures and financial products); pharmaceuticals; telecommunications; construction & engineering (especially in the energy sector and infrastructure projects); logistics, and defence.

Most of our International Arbitration team members are dual nationals or have lived and worked in more than one jurisdiction. The team offers top-tier legal and strategic advice in at least 13 languages, namely: Amharic, Arabic, English, French, German, Greek, Hindi, Italian, Portuguese, Punjabi, Russian, Spanish, and Urdu.

This diversity enables us to understand local linguistic, cultural and commercial nuances – an advantage that has proven decisive in many of our recent instructions.

We are known for our determination and ability to break through deadlocked cases. We have built a particular reputation as a ‘go to’ firm in particularly complex or acrimonious cases which require procedural creativity or an otherwise innovative approach in order to progress them to a new level. We are often asked to step in and take on a leading role in place of, or alongside, existing arbitration counsel because of our pragmatic and robust approach to achieving our clients’ commercial objectives.

Our International Arbitration team members regularly act as arbitrators and help shape the development of arbitration globally through their institutional roles. For example, Partner Tsegaye Laurendeau sits on the panel of experts/arbitrators of P.R.I.M.E. Finance, an international organisation which aims to assist with the resolution of disputes concerning complex financial products. He has also been elected as a member of the ICC Court for the 2024-2027 mandate. Counsel Amany Chamieh also serves on the boards of leading arbitral institutions and organisations including Association Française d’Arbitrage and Paris Arbitration Week. These appointments position our members and our firm at the forefront of the market, and enable us to help shape arbitration best practice worldwide alongside other leading practitioners and firms.

We regularly act as co-counsel with other law firms worldwide. We bring in-depth experience and strategic input to the table without disrupting the original client-lawyer relationship between our co-counselling partner and the end client. Our collaborative approach has made us a trusted partner for leading international and domestic firms.

KEY INDIVIDUALS

Ioannis is an efficient lawyer and a pleasure to work with.

– Chambers UK 2026, International Arbitration

Fantastic experience and responsiveness with an extremely good tactical mind.

– Chambers UK, International Arbitration

Philip Dunham: sharp legal brain allied with an ability to focus on relevant detail. Excellent advocate and cross-examiner.

– The Legal 500 EMEA 2025, Dispute Resolution: International Arbitration

Ulrich Helm is much admired by peers for his strategic thinking.

– Lexology Index

Tsegaye is truly outstanding, with an excellent “ability to analyse the key drivers in a disputes situation quickly and devise and implement an effective strategy.

– The Legal 500 UK 2025, International Arbitration

A smart and sophisticated lawyer who is responsive, reliable and standout.

– The Legal 500 UK 2025, International Arbitration

A highly skilled arbitration practitioner.

– Lexology Index, Arbitration

Pietro is standout and extremely talented.

– The Legal 500 UK 2025, International Arbitration

Case Highlights

Representing a European services company in ad hoc UNCITRAL arbitration proceedings against a South American country with respect to claims in excess of USD 250m relating to economic measures targeting the investor’s customs infrastructure investment.

Representing a group of investors in a large-scale mining project in Eastern Europe in a USD 150m UNCITRAL investment treaty arbitration claim against the host State involving allegations of expropriation and breaches of the FET standard.

Representing a global conglomerate engaged in the procurement and export of agricultural commodities with operations across Africa, in relation to a USD 400m investment treaty arbitration against an East African State and involving allegations of expropriation of the investor’s goods and other malfeasances.

Representing the beneficiaries of a Panamanian Foundation in claims for losses up to USD 500m incurred due to the fraudulent mismanagement of the offshore trust structure by rogue fiduciaries. The claim included applications for interim relief (including worldwide freezing orders, asset disclosure orders and information orders) in the Caribbean, Europe and Asia, in support of an ICC arbitration seated in Panama.

Representing an entity within a large gambling group in a USD 600m ICC dispute arising out of a joint-venture partnership with a listed software group in relation to a project in LATAM. The case involved parallel court proceedings in England and LATAM, as well as ICC arbitration proceedings.

Representing CA Investment (Brazil), the Brazilian subsidiary of Paper Excellence, in a much-publicised USD 3bn dispute against Brazil's second largest business group, J&F Investimentos, concerning the acquisition of Eldorado Brasil, a pulp production major. The dispute spanned 6 years, involved four arbitrations and multiple court proceedings in several jurisdictions. We played an instrumental role in securing a global settlement between the parties.

Representing a leading Western European privately-owned natural gas supply company in a EUR 400m ECT/ICSID dispute with an Eastern European State arising out of regulatory changes having an adverse impact on the investment.

Acting for a MENA State in defending a USD 600m UNICTRAL arbitration brought by a leading Middle Eastern mobile operator arising out of a tender process for a private GSM licence and a change in local legislation. The dispute involved issues of indirect expropriation and violation of FET standards.

Representing a MENA State in defending a USD 20m claim brought by a Turkish construction company relating to non-payment of government’s debts under a settlement agreement relating to multiple public works projects, and involving issues of denial of justice and expropriation.

Representing a European FTSE 250 exploration and development company in a USD 5.5bn UNCITRAL arbitration against a South Asian State concerning violation of FET standards and compromise of the principle of legal certainty arising out of the adoption of adverse retrospective income tax measures and seizure of the investor’s shares dividends to fulfil the tax demand.

Representing a JV of European construction companies in a USD 330m ICSID dispute with a Middle Eastern State relating to the construction of an urban highway.

Representing a MENA State in defending a USD 500m claim brought by a UAE construction company in ad hoc/UNCITRAL arbitration under the Organisation of the Islamic Conference (OIC) Agreement relating to the termination of its investment in the host State, and involving issues of expropriation and FET standards.

Representing one of the largest privately owned US industrial conglomerates in a USD 400m ICSID dispute against a South American State in relation to the development, construction and operation of two fertiliser factories and concerning an expropriation, violation of FET and full protection and security standards.

Representing an oil exploration company in enforcing a USD 50m LCIA arbitration award in England against a Middle Eastern company and in bringing proceedings against the parent company for fraud. The underlying dispute concerned misappropriation of oil drilling equipment.

Representing a Mediterranean investor in relation to a USD 10bn ECT/ICSID claim against the Republic of Turkey arising out of the expropriation of the investors’ power plant concession rights for the generation, distribution, transmission and marketing of electricity. This case involved high-profile political considerations as well as allegations of forgery.

Representing a European investor in two separate ICSID arbitrations with the total value of USD 400m against a South American State in relation to the largest industrial plants for the production, processing and distribution of glass containers and concerning direct expropriation, as well as violations of FET and full protection and security standards.

Representing a State in the MENA region in an ICSID dispute with the total claim value in excess of USD 5bn in relation to an investment into the operation of a telecoms company in Algeria.

Representing a leading European investor in a USD 500m UNCITRAL arbitration against a Western African State arising out of the expropriation of the investor’s rights in a highly lucrative iron ore project.

Representing a European investor in a claim in excess of USD 250m in relation to ad hoc UNCITRAL/PCA arbitration against a South American State in connection with economic measures targeting an investment in the State’s customs infrastructure.

Representing a US investor in a USD 600m ICSID arbitration against an Eastern European State in relation to the exercise of its rights under oil and gas exploration licences and involving issues of expropriation, as well as systematic arbitrary and unlawful conduct by the State.

Representing a State in the MENA region in USD 2.6bn ad hoc arbitration involving issues of full protection and security, expropriation and FET standards in the context of the Arab Spring events and concerning an investment into local infrastructure (eg. water supply, roads) in remote regions.

Representing a State in the MENA region in a USD 2bn ICSID arbitration initiated by Middle Eastern and other investors concerning alleged violations of investors’ rights in relation to a long-term contract for the supply of natural gas.

Representing investors in an ICSID arbitration involving denial of justice claims against an East Asian State over its failure to pursue a fraud prosecution against its local partner arising out of a USD 50m investment in a copper, gold and iron mining project.

Representing a South American State in a USD 1.5bn ICSID arbitration with a major US oil company arising from the termination of a participation contract to explore and exploit oilfields, and a counterclaim for environmental harm.

Representing an Asian insurance company in ICSID arbitration against a Central European State in relation to claims of USD 1bn arising from the expropriation of an investment in the financial sector.

Representing a leading logistics company in a USD 1bn ICSID arbitration against a State in the MENA region in connection with the expropriation of its investment in the telecommunications sector.

Representing a PE fund in a number of arbitrations and related court proceedings in multiple jurisdictions initiated by investors in relation to the transfer of assets worth over USD 1.5bn managed by the fund.

Representing three European chemical companies in a series of USD 1.6bn disputes in Paris, Geneva and London against the European subsidiaries of a large North American chemical concern arising out of a JV agreement concerning manufacture of a product used for the production of nylon and relating to unauthorised use of IP and trade secrets in competing projects.

Representing a group of shareholders against two shareholders in the same company in a claim with a total value exceeding USD 1bn concerning the interpretation of a put option provision and underlying accounting standards in connection with the acquisition of shares in the company.

Acting for a North American biomedical science company as claimant in an LCIA arbitration in a USD 100m dispute with a European competitor relating to a joint experimental drug development programme and concerning the respondent’s unauthorised use of third-party IP rights and trade secrets.

Representing a natural gas seller in a series of arbitrations in Cairo and Madrid commenced by the buyer and owner of a liquefaction plant and arising out of a tolling agreement and a related long-term gas supply agreement with the total value of claims exceeding USD 4bn.

Representing a global US specialty chemicals development and manufacturing company in two multi-million EUR arbitrations arising out of SPAs for the sale of chemical plants and concerning warranties re defects and plant capacity.

Acting for two international construction contractors who were respondents in a USD 3.7bn ICC arbitration in London initiated by a Middle Eastern State-owned company. The dispute concerned the development of a world-class medical facility in the Middle East.

Representing the main contractor and an airport operator in a USD 2bn claim against an aviation infrastructure company arising out of the termination of a design and construction contract in relation to an airport in the UAE.

Representing a European utility company in a EUR 400m claim against a multinational energy company and an offshore wind farm operator concerning a project in the North Sea and involving issues of delay and termination.

Representing a Western European company against a major Scandinavian oil and gas company in a USD 100m dispute arising out of a contract for the sale of gas condensate procured from a third party, an Eastern European company. The dispute involved multiple jurisdictions around the world and concerned issues of interference with the client’s source of supply, wrongful termination of the contract and fraud.

Representing the claimants in a USD 25m claim against a leading Thai wind energy company concerning the respondent’s refusal and/or failure to indemnify and keep indemnified the claimants in accordance with the terms of an indemnity agreement.

Representing a number of insurance companies in the excess layer insurance tower in a USD 270m arbitration commenced by a large Asian manufacturing group under the W&I policy in relation to the sale of a sanitary ware manufacturing company from a PE investor and concerning the interpretation of exclusion clauses.

Representing co-founders and minority shareholders in a USD 150m dispute with a large corporate majority shareholder in relation to a leading Fintech company in Southeast Asia.

Representing one of Guyana’s largest industrial conglomerates in a USD 200m dispute against a mining corporate in relation to a large-scale gold mining JV.

Representing a South American company in a dispute against a State-owned company in the MENA region in a dispute exceeding USD 1bn in relation to the artesian wells drilled as part of the Great Man-Made River project in Libya, one of the largest engineering projects ever undertaken.

Representing a large corporate in a USD 60m dispute relating to a contract for the supply of raw materials in the steel production industry and concerning the applicability of contractual force majeure provisions in the context of UK and EU economic sanctions against Russia.

Representing a leading European telecoms company in a JV shareholders’ dispute exceeding USD 1.5bn in relation to the ownership of the largest mobile phone operator in a State in the MENA region.

Representing a large oil exploration and mining group against a leading Russian bank in a number of cases concerning credit facilities, underlying security and issues relating to exploration methods with the total value of claims and counterclaims totalling USD 6bn.

Representing a major company in a number of cases initiated by the Republic of Mozambique concerning the supply of vessels and shipyard construction involving allegations of fraud, bribery and corruption with the total value of disputes in excess of USD 2bn.

Representing a major European company in a shareholders’ dispute with a total value exceeding USD 100m in relation to a profit-sharing arrangement which concerned a nuclear power plant in the PRC.

Representing a Western European pharmaceutical company in a number of contractual disputes with a total value in excess of USD 300m relating to development, regulatory approval and commercialisation of a novel neuromodulator product, as well as breaches of a distribution agreement involving numerous jurisdictions around the world.