Mostly, yes. The large banks are strict about know your customer rules and willing to divulge information to foreign states depending on tax treaties. Keep in

Mostly, yes. The large banks are strict about know your customer rules and willing to divulge information to foreign states depending on tax treaties. Keep in mind the Panama papers you probably are thinking of had little to do with Panama. The law firm was located in Panama, but the corporations and shady financial things were happening in the usual handful of island nations. If the law firm was located in New York it would have been the Manhattan papers - it didn't have much to do with Panama at all.