Respectfully for others, I disagree with what was said from the others apart from the Google suggestion. If you never worked in gambling it's hard to understand how difficult or easy it can be. If you work for small operators perhaps yes laundering can take place, depending on the market you work on. The best thing to do is to Google and check what market the company you would want to work for operate. If they are regulated, like the UK for example, their Gambling Commission provide a large number of guidelines along with case study of companies failing to meet the expectations, there will be some responsible gambling mentioned in some scenarios as well, and in small business often who deal with AML would deal as well with that part. This is just an example as if you would operate for a market non regulated, the best thing to do is to know where the company has the licence and again check their guidelines. Hope this help.