Client Successes

Corporation reduces documents by 99.8% in large-scale, international regulatory investigation

The Challenge

As part of a wide-ranging US regulatory investigation, the client was involved in a large
discovery project that uncovered more than 35 million potentially relevant documents in the United States and France.

The US courts requested production of all potentially relevant documents from the  corporation’s Paris operation.

Although the company suspected that many of the French documents were duplicative of the US documents, compliance was mandatory, and the client needed to be able to prove the documents were duplicative without violating any French or international regulations.

Due to the French Blocking Statute (French law 68-678 of 26 July 1968), which broadly prohibits the transfer of data to be used as legal evidence in proceedings outside of France, the client was legally unable to produce data stored in France to US legal teams to verify whether the data was duplicative.

The Solution

We then created a custom-built hashing process to generate hashes for the French documents, which could then be exported to the US for comparison with the documents under review there. This allowed the client to deduplicate the data set without violating any cross-border data transfer regulations.

After running our customized hashing deduplication, the body of documents had been reduced from about 1 million French documents to fewer than 20,000 documents. Although significant, it was still an amount of data unlikely to be approved for export by the CNIL (National Commission on Informatics and Liberty | commission nationale de l’informatique et des libertes), the national data protection authority for France.

So we architected a second step to further reduce the data. We first deployed a mobile service solution application in the company’s Paris office — installing a mobile server rack, setting up a local Relativity instance, and creating a completely on-site, off-the-internet, secure war room to service the project.

We sourced and hired an on-site review team of experienced reviewers fluent in both French and English with subject matter expertise relevant to the client.

Over the course of two weeks, the team reviewed all 20,000 remaining documents for relevance, privilege, and personally identifiable information (PII), and reduced the data set further, to fewer than 2,000 documents.


After partnering with Legility, the client reduced their total body of French documents for production from 1 million to 2,000 — an incredible reduction of 99.8%, and enabling them to easily comply with a large-scale regulatory investigation without violating French regulations.

By the Numbers

35 million documents for production

2 countries, 2 languages

20,000 documents after custom hash process

99.8% total document population reduction

After partnering with Legility, the client reduced their total body of French documents for production from 1 million to 2,000.

99.8% reduction

in total document population

The right people, process and technology deliver the right results.

About the author


Legility, a leading provider of technology-enabled legal services, provides consulting, technology, managed solutions, and flexible legal talent to corporations and law firms. The company has more than 1,000 lawyers, engineers, consultants, technology and data specialists, and operational experts serving more than one-third of the Fortune 100 and one-quarter of the Am Law 200. Legility helps its clients improve operational efficiency. By combining people, processes, and technology, Legility offers innovative and bundled solutions that align with how the legal market is increasingly looking to engage.

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