i have been trying to open an online trading account with some vendor so that i can buy and sell shares in india. it seems i have also need a demat account and a pan card too. i have the pan card and i have a basic savings bank account. i need to approach the bank with which i have a savings bank account to link that account with the demat account that is freely offered by some banks. so for that i need to give a written communication about the need for a demat account. there is a small service charge per year and i feel it is reasonable.