law: Indian Contract Act, 1872 
  44. Effect of release of one joint
  
  promisor
  Where two or more persons have made a joint promise, a release
  
  of one of such joint promisors by the promisee does not discharge the other
  
  joint promisor or joint promisors, neither does it free the joint promisor so
  
  released from responsibility to the other joint promisor or joint promisors.