There is an Act called Prevention of Money Laundering Act 2002 (PMLA). The purpose of this act is to prevent the financing of terrorism and to prevent laundering of money i.e. to legalize or officialize or canalize the money generated from illegal activities like drug trafficking, organized crimes, hawala rackets and other serious crimes. This act is a part of the Global measures being taken by all the countries under the initiatives of UN agencies. It is applicable to all SEBI Registered brokers/sub-brokers and other financial institution who are dealing in any kind of financial assets. It is an obligation of the entities to whom this Act is applicable, to report certain kind of transactions routed through them to FINANCIAL INTELIGENCE UNIT, a department specially set up to administer this Act under the Ministry of Finance. The transactions which are supposed to be reported are cash transactions above rupees ten lakhs or series of cash transactions below ten lakhs but aggregating to above ten lakhs in a month or its equivalent in any foreign currency and the transactions which may not be in cash but suspicious in nature. Any such types of transaction though not executed but attempted and failed are also required to be reported. SEBI has issued master circular no. ISD/AML/CIR-1/2010 dated February 12, 2010. You are requested to go through the same for more details.