law: 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.