Mastercard and Visa are probing claims that illegal gambling websites facilitated deposits through their networks.
An investigation into the sites found that Mastercard and Visa were failing to prevent their networks from being used for those transactions, The Guardian reported last week.
The investigation — by the group Investigate Europe — found that Mastercard was offered as a payment method on nine casino and live sports betting websites targeting customers in the United Kingdom, while Visa was listed on two, per the report. The findings were part of a broader examination of a network of gambling sites operating in Europe despite being outlawed.
