According to the research report by the Council of Europe1, one of the typologies of money laundering through online gambling is the use of multiple accounts and identities to conceal the source and destination of funds. This can be done by opening several accounts under the same name using different IP addresses, or by using false or stolen identification documents to create multiple accounts. Another typology is the use of online gambling platforms that are not regulated or authorized by the jurisdiction where the customer is located, or that do not require know-your-client information from users. This can allow money launderers to access the online gambling services from multiple countries, without being subject to any verification or monitoring by the authorities.
Reference:
1: Research report - The use of online gambling for money laundering and the financing of terrorism purposes, Council of Europe, April 2013.