This article provides an overview of Application Supported by Blocked Amount (ASBA), a new mechanism introduced by SEBI in 2008 for retail investors to apply for initial public offerings, rights issues, and follow-on public offers. Under ASBA, the application amount is blocked in the investor's bank account rather than paid upfront. If the application is selected, the amount is debited, otherwise it is unblocked. Key benefits for investors include earning interest on the blocked amount and faster refunds without waiting for allotment. The article defines ASBA and outlines the application and allotment process as well as eligibility and benefits for investors.