How to do Renewal of mortgaged lease? Section 71 of Transfer of Property Act, 1882
71. When the mortgaged property is a lease, and the mortgagor obtains a renewal of the lease, the mortgagee, in the absence of a contract to the contrary, shall, for the purposes of the security, be entitled to the new lease.
Rights and liabilities of Mortgagee
Section 74 - Right of subsequent mortgagee to pay off prior mortgagee
Section 75 - Rights of mesne mortgagee against and subsequent mortgagees
Section 80 - Tacking abolished