The next document is a set of agreements between the share broker and the client. This agreement has to be separately signed for BSE and NSE. Both the agreements are identical and have been prescribed by SEBI. There is also a separate agreement for Depository operation between the Depository Participant and the Beneficial owner. If you are working through a sub share broker then there is a tripartite agreement between the share broker, sub share broker and client. This agreement allows you to do only cash market trades; in case you want to deal on derivatives market then a bipartite agreement is required. All these agreements have to be stamped.
Make sure you read the risk disclosure document before signing and submitting to the share broker. This document will explain the different risk involved with your transaction for which you will be responsible. There is an inherent risk of price variation (volatility) of the securities you have dealt in, risk due to low liquidity in a particular company, risk due to more than normal difference between a person wanting to buy and another wanting to sell. The document also explains certain risk mitigation measures that can be used by you.