UIGEA

A 2006 US federal law that prohibits gambling businesses from knowingly accepting payments connected to unlawful online bets — targeting the money flow rather than the individual bettor.

Definition

The Unlawful Internet Gambling Enforcement Act (UIGEA), enacted in October 2006, makes it unlawful for a business engaged in the betting or wagering trade to knowingly accept most forms of payment (cards, wire transfers, cheques) in connection with a bet that is already illegal under some other federal or state law. Crucially, UIGEA did not itself make online gambling illegal or criminalise players; it created payment-processing obligations and enforcement leverage against operators and financial institutions. Its practical effect was to choke the flow of funds to offshore sites serving US customers. Because the burden fell on banks and processors, many publicly listed operators withdrew from the US market rather than risk their banking relationships and listings.

Worked example

After UIGEA passed, several London-listed operators (such as PartyGaming) immediately exited the US market, and their share prices fell sharply, because continuing to serve US customers threatened the payment channels and stock-exchange listings the law put at risk — even though the operators themselves were based outside the United States.

Why it matters

UIGEA is a defining moment in iGaming history: it reshaped the US market for over a decade, drove the withdrawal of reputable public operators, and pushed activity toward offshore and grey-market sites. For professionals it illustrates a powerful regulatory technique — regulating the payment rail rather than the activity — and remains essential context for understanding US market structure and the later Black Friday enforcement action.

Related

Note: The core mechanics (payment-processing prohibition, 2006 enactment, no criminalisation of players) are well established. Exactly which underlying bets are 'unlawful' depends on other federal and state laws and has been litigated; treat specific applicability as jurisdiction- and fact-specific.