Negotiable Instruments Act, 1881
87. Affect of material alteration
Any material alteration of a negotiable instrument renders the same void as against anyone who is a party thereto at the time of making such alteration and does not consent thereto, unless it was made in order to carry out the common intention of the original parties;
Alteration by endorsee:
and any such alteration, if made by an endorsee, discharges his endorser from all liability to him in respect of the consideration thereof.
The provisions of this section are subject to those of sections 20, 49, 86 and 125.