Debendra Nath Sen vs Mirza Abdul Samed Seroji And Ors. on 18 February, 1909
2. It may be conceded that, as a general rule, the rights of persons who have acquired an interest in the mortgaged estate since the mortgage, cannot be defeated or impaired by any subsequent arrangement to which they are not parties. If, therefore, a mortgagee with notice that the equity of redemption in a part of the mortgaged property has been conveyed, releases any part of the mortgaged estate, he must abate a proportionate part of the mortgage debt as against such purchaser. But this rule does not apply when the mortgagee releases a portion of the mortgaged property before the residue is transferred to third person. No doubt, if he does release, he diminishes his own security but, as Subsequent purchasers can only take subject to the mortgage, the mortgagee may throw the whole burden of the mortgage debt on the residue. It was pointed out by this Court in the case of Debendra Nath Sen v. Mirza Abdul Samed 10 C.L.J. 150 : 1 Ind. Cas. 264, that, although a purchaser of mortgaged premises is not estopped by his mere acceptance of the deed from disputing the validity of the mortgage or the amount due under it, on the ground of objections which were open to the mortgagor, yet he is limited to such objections or defences only as might have been pleaded by the mortgagor himself; and he cannot even set up all of these, for he is not permitted to urge defences strictly personal to the mortgagor. The appellants, therefore, by their purchase of the 7th July, 1904, occupy the same position as their vendors, the mortgagors, and it is not open to them to compel the mortgagee to grant a proportionate abatement of the mortgage debt, unless it is established that such a defence would have been available to the mortgagors themselves. Now, what was the position of the mortgagors at the time when they transferred the equity of redemption to the present appellants? They had transferred their interest in some of the mortgaged premises to the mortgagee. The effect of the transaction was that the mortgagee became entitled to hold the properties purchased by him free of the mortgage lien, if he applied the purchase money towards the satisfaction of the mortgage debt. It is difficult to appreciate upon what principle the mortgagors could be allowed to resile from the position they had deliberately assumed, and to contend that the mortgagee was bound, in substance, to allow credit, not merely for the purchase-money, but for an additional sum, which, upon a fair valuation of the properties purchased by him, might be determined to be the difference between the market-value and the settled price. It has not been suggested that the effect of the purchase by the mortgagee was to extinguish his mortgage security in its entirety.