Get latest articles and stories on Latest News at LatestLY. To curb the misuse of Power of Attorney (PoA) given by clients to stock brokers, Sebi on Thursday widened the scope of the Demat Debit and Pledge Instruction (DDPI) for pledging and repledging of securities for margin purposes. Latest News | Sebi Clarifies on Guidelines Pertaining to Instruction Slips for Share Pledging.