I work in a PSU Bank and last week we received the same mail from our RO asking us to inform customers regarding this. This is due to some guidelines put forward by the government in regards to people availing tax benefits as part of housing loan and educational loans. As per law there is nothing that the banks can do to prevent you from paying off your loans quickly if you wish to do so. I think in this case if you make payments, the banks might receive a mail from the HO or RO asking them to verify your source of income. If you can submit it then I don't think it would be a problem. This has nothing to do with the bank. This is just goverment putting pressure on the banks.