Because your money is guilty till proven innocent. If you can’t show the legit origin for the money, they will take it. I disagree with the policy, but that’s

Because your money is guilty till proven innocent. If you can’t show the legit origin for the money, they will take it. I disagree with the policy, but that’s how it works. Using a mixer makes it more difficult to explain the source of the money, it makes things worse not better.