A delivery instruction slip is a physical instruction slip that you can fill out to debit shares from your Demat account. Just like how you will use a cheque to withdraw funds from your account. If you do offline trading at one of our investment centers, then a DIS is required to authorize all your sell transactions. Your DIS is usually shipped to your registered address after opening your account. If you have not yet received your DIS after 10 days of opening your account at Arihant, please reach out to customersupport@arihantcapital.com.