Paddy Power Betfair has been fined 2.2 million pounds by the UK's gambling watchdog, for failing to protect customers who were displaying signs of problem gambling.
The Gambling Commission also says the company failed to stop stolen money being gambled.
It says "significant amounts" of stolen money flowed through the exchange, and Paddy Power Betfair has a duty to "prevent the proceeds of crime from being used in gambling."
The company, which has its headquarters in Dublin, admits breaching its social responsibility and says its focusing on making sure it doesn't happen again.
