Mediapart, which based its allegations on the so-called "Football Leaks' documents, said PSG had until the spring of 2018 asked recruiters to record the origin of players in four categories: "Francais" (French), "Maghrebin" (North African), "Antillais" (West Indian), and "Afrique noire" (Black African).
It is against French law to collect personal data which reveals racial or ethnic origins of individuals.
France's Human Rights League (LDH) has filed a legal complaint against the Qatar-owned club, which is top of the French First Division.
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Earlier this month, PSG acknowledged and condemned the existence of the ethnic identity files.
(Reporting by Emmanuel Jarry; writing by John Irish; editing by Richard Lough)
