Some of the main challenges identified related to the requirements for the proof of unlawful origin, bank secrecy, ne bis in idem issues, dual criminality, asset sharing and conflict between judicial systems.
所列举的一些主要难题涉及要求证明非法来源、银行保密、一罪不二审问题、两国共认罪行、资产分享和司法制度之间的冲突。