Assuming the receiver uses a proper offshore construct to accept the payment, this would go by unnoticed by your DD?
But most interesting: What is your best guess - Your partner says you find “a hand full” from a few hundred - how many of these cases do you miss because the recipients use a not easy traceable proxy entity to collect the payment?
Do you try to uncover such hidden actions, if yes, how?
Also, is there a good reason why someone would not use a offshore proxy/holding?