Between 18 November and 31 December 2015, the Bank of Eritrea began replacement of all nakfa banknotes. The banknote replacement initiative was designed to combat counterfeiting, the informal economy but primarily Sudanese human traffickers who had accepted payments in nakfa banknotes in exchange for transporting would-be migrants primarily to Europe. A consequence of this was substantial amounts of the country's currency existed in vast hoardings outside of Eritrea.