This document discusses Hawala banking, an informal money transfer system originating in Asia and the Middle East. Hawala allows money to be transferred without physically moving it by using a network of brokers who manage credit balances. It is commonly used for remittances but also to transfer funds illegally for purposes like tax evasion, sanctions evasion, and terrorism financing. The document outlines how Hawala transactions work, who uses the system, and challenges for regulation and law enforcement.