The following precautions need to be observed by BOs with respect to instruction slips:

• Ensure that DP issues Debit Instruction Slip (DIS) book.
• Ensure that instruction slip numbers are pre-printed on each DIS.
• Ensure that the demat account number is pre-stamped on each DIS.
• After the DIS has been filled, strike out remaining blank space to prevent misuse.
• Entire details to be furnished in DIS should be filled in properly.
• Issue separate DIS for different instructions such as On Market, Off Market, transfers etc.
• Retain the duplicate DIS, in which DP has acknowledged the receipt stamp; in safe custody.
• Keep the DIS book in proper custody when it is not in use. In case of loss/ misplacement of
  DIS, the same should be intimated to the DP immediately.
• One should never sign and keep a blank DIS.
• All the holders must confirm any alteration, correction or cancellation made on the DIS with
  their signatures.