The British financial regulator has fined crypto exchange Coinbase $4.5 million for β€œrepeatedly breaching” a requirement that prevented it from serving β€œhigh-risk customers.”

American cryptocurrency exchange Coinbase has been hit with a Β£3.5 million (around $4.5 million) fine as the company β€œrepeatedly” broke a requirement that prevented it from offering services to β€œhigh-risk customers,” the Financial Conduct Authority said in a press release.

According to the regulator, CB Payments Limited, being part of the Coinbase Group, operates as a gateway for customers to trade crypto β€œvia other entities within the Coinbase Group.” Despite entering a voluntary agreement with the FCA to restrict onboarding new customers classified as high-risk, CBPL breached it by onboarding and serving over 13,400 high-risk customers. The FCA estimates that more than 30% of these customers deposited nearly $25 million.

β€œThese funds were used to make withdrawals and execute crypto transactions via other Coinbase entities, totaling approximately $226 million.”

The British regulator attributed the breaches to CBPL’s β€œlack of due skill, care and diligence in the design, testing, implementation and monitoring of the controls,” adding that Coinbase’s β€œinadequacies” in the initial monitoring of compliance went undiscovered for β€œalmost two years.”

As of press time, Coinbase made no public statements on the matter, though the FCA noted that the exchange agreed to resolve the issue and qualified for a 30% discount on its fine. Following the news, Coinbase shares plunged nearly 5%, according to data from Google Finance.

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