[thraxil]

There's still quite a gap between "suspicious" and "probable cause". Just having a large amount of cash isn't by itself illegal. You could easily have enough cash to live on for quite a while having inherited it or earned it decades ago, etc.

[marcheradiuju]

There is a gap, but in my country, the AML regime is concerned with the bar of "reasonable to suspect" rather than "probable cause". This is the only way you could catch any laundering of any sophistication.