How do I block my FASTag account, in case my vehicle is lost? This topic is empty. Viewing 1 post (of 1 total) Author Posts January 16, 2022 at 2:54 pm #797 adminKeymaster Customer should call his Issuing bank customer care numbers and block his FASTag account. Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Continue with Google Log In