Chinese e-commerce giant Alibaba has agreed to pay $600 million and enter into a non-prosecution agreement with the Department of Justice (DOJ) after admitting it failed to prevent tens of thousands of illegal product sales into the U.S. through its online marketplaces.

The DOJ announced Wednesday that Alibaba Group Holding Ltd. and its U.S.-based payment processor, AUS Merchant Services, will pay a combined $600 million to resolve allegations they failed to stop merchants from selling and importing illegal pharmaceuticals, controlled substances, regulated chemicals and pill-making equipment through Alibaba.com and AliExpress.com.

As part of the agreement, Alibaba admitted that between January 2016 and December 2024, roughly 80,000 unlawful product sales involving imports into the U.S. violated the Federal Food, Drug and Cosmetic Act, and other federal laws.

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The company acknowledged those transactions generated more than $200 million in gross merchandise value.

Court documents say the company failed to fully incorporate certain wire transfer data into its transaction monitoring system, causing it to miss some high-risk transactions. In at least one instance, a merchant continued selling prohibited products to U.S. buyers after AUS investigated and reported the seller.

Federal investigators conducted more than 40 undercover purchases of pharmaceuticals and pharmaceutical counterfeiting equipment that were illegal to import into the U.S., the DOJ noted.

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AUS Merchant Services, formerly known as Alipay U.S., also admitted shortcomings in its anti-money laundering compliance program.

According to court documents, the company failed to fully incorporate certain wire transfer data into its transaction monitoring system, causing it to miss some high-risk transactions. In at least one instance, a merchant continued selling prohibited products to U.S. buyers after AUS investigated and reported the seller.

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"Companies operating online marketplaces — whether based in the United States or abroad — must implement appropriate safeguards to prevent bad actors from exploiting their platforms," Assistant Attorney General Brett A. Shumate said in a statement. "If they fail to do so, the Department will hold them accountable."

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Alibaba said it cooperated fully with the Justice Department's investigation and has agreed to strengthen compliance measures governing products sold by third-party merchants on its e-commerce platforms.

"Alibaba reached a mutually satisfactory resolution with U.S. regulators on bringing stricter compliance to the sale of products in the United States by third-party merchants on its e-commerce platforms," an Alibaba spokesperson told FOX Business on Wednesday. "This settlement reflects a thorough regulatory process with Alibaba's full cooperation and our commitment to best-in-class standards of control, policies, and measures against non-compliant product sales."

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Under the agreement, Alibaba will pay a $125 million criminal penalty and forfeit $200 million, while AUS Merchant Services will pay an $85 million criminal penalty and forfeit $190 million.

Both companies also agreed to strengthen their compliance programs and continue cooperating with federal investigators.

The Associated Press contributed to this report.