Well, even in the US you get libeled and the process itself is enough punishment. I don't think the underlying truth has any bearing on there being law suits or not. It's merely a calculation of "is it worth it?", and probably given the current popularity of these kinds of leaks versus the Streisand effect it is absolutely not worth it regardless of there being truth to it or not.
The worst outcome for some of these rascals is if there are wild exagerations to their case. What are they gonna say? "They are lying, I never laundered *that* amount of money, they are totally blowing things out of proportion!", that wouldn't work would it?