These deep discount bond have various maturity dates. Most were issued in the 1990's and mature in 20 years. Many of these bonds came due in January of this year. However, many were called in for early redemption in 2008. So check the issue and maturity date which is listed on your bond. Here are the instructions on how to redeem them including a phone number where you may get more information on your specific bond:

http://www.sardarsarovardam.org/assets/S...