One of my relatives has lost her PPO No. (Pension Payment Order). Her husband worked as a Professor at Science College, Calcutta University, and passed away in 1997. She has been receiving her payments without any issues until this year when she faced difficulty filling out the Life Certificate form due to the absence of the PPO No. The SBI bank branch has refused to assist her. How can she retrieve her PPO No. with the help of pensioners' sites, etc.? She is unable to travel.