1) it is serious offence of cheating and forgery committed by the pensioner under section 420 , 468 iof IPC
2)section 468 provides Whoever commits forgery, intending that the *[document or Electronic Record forged] shall be used for the purpose of cheating, shall be punished with imprisonment of either description for a term which may extend to seven years, and shall also be liable to fine.
3) complain to the govt authorities regarding the fraud perpetuated by the pensioner