law: Indian Evidence Act, 1872 
  19. Admissions by persons whose position must be proved as
  
  against party to suit
  Statements made by
  
  persons whose position or liability it is necessary to prove as against any party
  
  to the suit are admissions, if such statements would be relevant as against
  
  such persons in relation to such position or liability in a suit brought by or
  
  against them, and if they are made whilst the person making them occupies such
  
  position or is subject to such liability.
  Illustration
  A undertakes to
  
  collect rents for B.
  B sues A for not
  
  collecting rent due from C to B.
  A denies that rent was
  
  due from C to B.
  A statement by C that
  
  he owned B rent is an admission, and is a relevant fact as against A, if A
  
  denies that C did owe rent to B.