An international investigation led by the European Investigative Collaborations (EIC) network and media outlets including Mediapart and _infoLibre has uncovered that the French digital payments company Worldline, along with its Belgian subsidiary Payone, processed billions of euros in suspicious and fraudulent transactions over the past decade. The probe, dubbed "Dirty Payments," revealed that Worldline knowingly facilitated high-risk clients involved in illegal activities such as online fraud, prostitution, illegal casinos, and pornography, allowing these operations to generate tens of millions of euros. The investigation also exposed a network of fake websites managed by an ex-Hollywood producer and an online prostitution empire run by David Azzato, operating with apparent impunity under Worldline's oversight. Following the revelations, Worldline's shares plummeted by more than 40%, wiping out approximately 500 million euros in market value, and its bonds also suffered losses amid concerns over compliance and fraud cover-up allegations. Worldline's CEO Pierre-Antoine Vacheron attributed the share decline to an orchestrated media campaign. In response to the scandal, Belgian prosecutors have opened a money laundering investigation into Worldline's local subsidiary. The case has attracted scrutiny from national authorities across Europe and raised questions about the company's governance and risk management practices.