Fraudsters Targeted Polymarket US Accounts in 2026
Criminals attempted to use stolen debit cards to launder money through the betting platform in February 2026.
Updated on Sept. 30, 2026 in Financial Crime
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In February 2026, fraudsters attempted to launder at least $10 million by using stolen debit cards to fund accounts on the betting platform Polymarket US. Most of these suspicious transactions were caught by the payment processor before the funds could be moved.
Why it matters
The attempted scheme highlights significant security vulnerabilities in using betting platforms to move illicit funds. By exploiting these services, criminals sought to wash money from stolen cards before withdrawing the proceeds.
Checkout.com blocked the vast majority of the $10 million in attempted fraudulent deposits. The Commodity Futures Trading Commission, which designated Polymarket US as a contract market in July 2025, continues to oversee the platform.
The players
Polymarket US
This is a regulated betting platform that operates in the United States through its corporate entity QCX LLC.
Checkout.com
This is a payment processing firm that manages transaction security and deposit filtering for various online platforms.
Commodity Futures Trading Commission
This federal agency regulates derivatives markets and granted Polymarket US its status as a contract market.
The details
Perpetrators linked stolen debit cards to thousands of accounts to place bets, attempting to move money through the platform's system. They then sought to withdraw the funds to separate accounts or cards under their control, violating previous platform policies requiring matching deposit and withdrawal sources.
Timeline
9 July 2025: Polymarket US was designated as a contract market.
February 2026: Fraudsters allegedly utilized stolen cards to target the platform.
Legal Context
This incident occurred within the framework of the Commodity Futures Trading Commission contract market designation. It highlights the ongoing challenges of maintaining compliance and security as platforms transition into regulated, legally recognized contract markets.
The attempted fraud suggests that betting platforms remain targets for sophisticated money laundering operations. Users should ensure their personal financial information is secure, as platforms may implement stricter identity verification and withdrawal protocols in response to such threats.
The takeaway
Financial security systems often face pressure from criminals attempting to exploit loopholes in betting platforms. Vigilance remains necessary for both platform operators and users to prevent the abuse of digital payment channels.
Further reading
For more information on similar enforcement actions, visit the Financial Crime section.
Source note: This article includes information reported by International Business Times UK.
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