EU Reporter Customs Union: EU steps up its rules on cash controls to fight money laundering and terrorist financing Published 10 seconds ago New rules came into force on 3 June, which will improve the EU's system of controls of cash entering and leaving the EU. As part of the EU's efforts to tackle money laundering and to cut off sources of terrorist financing, all travellers entering or leaving EU territory are already obliged to complete a cash declaration when carrying €10,000 or more in currency, or its equivalent in other currencies, or other means of payment, such as travellers' cheques, promissory notes, etc.