hawala
/həˈwɑːlə/noun
mass noun
- a traditional system of transferring money used in Arab countries and the Indian subcontinent, whereby the money is paid to an agent who then instructs an associate in the relevant country or area to pay the final recipient哈瓦拉（阿拉伯国家和印度次大陆的一种传统汇兑体系, 由经手人收款后指定相关国家或地区的合伙人向收款人付款）。
词源
from Arabic awāla, literally'assignment， bill of exchange'.