How bank make loan against property secure,in india???

How the bank make the loan given on property in India secure, as I only came to know that they only keep original property document and give loan.Then there is obvious that a person can make duplicate by making any excuse like loss,theft..and can take new loan for same property, could anyone please make me know how it is secured. As in case of vehicle hypothetication in name of banker made in RC of vehicle, and even if he tries to make copy, copy will contain lender name. I exactly want to know as like hypotheciation in the name of banker is in RC of vehcile what is done in RC of property so that property remains locked till he make repayment.