law: Negotiable Instruments Act, 1881 
  28. Liability of agent signing
  An agent who signs his name to a promissory note, bill of
  
  exchange or cheque without indicating thereon that he signs as agent, or that
  
  he does not intend thereby to incur personal responsibility, is liable
  
  personally on the instrument, except to those who induced him to sign upon the
  
  belief that the principal only would be held liable.