The income tax department has made it mandatory for the Reserve Bank of India (RBI) and state electricity boards to file an annual information return (AIR) on specific transaction by third parties. AIRs are returns filed by third parties such as banks, mutual funds about transactions carried out above a threshold, so that the department can match these returns with the income of assesses to detect any tax evasion. RBI is required to file an AIR containing information on remittances exceeding Rs 50 lakhs made by a service provider in India for receipt of services from abroad entities.