law: Prevention of Corruption Act, 1988
  20. Presumption where public servant accepts
  
  gratification other than legal remuneration
  (1) Where, in any trial of an offence punishable
  
  under section 7 or section 11 or clause (a) or clause (b) of sub-section (1) of
  
  section 13 it is proved that an accused person has accepted or obtained or has
  
  agreed to accept or attempted to obtain for himself, or for any other person,
  
  any gratification (other than legal remuneration) or any valuable thing from
  
  any person, it shall be presumed, unless the contrary is proved, that he
  
  accepted or obtained or agreed to accept or attempted to obtain that
  
  gratification or that valuable thing, as the case may be, as a motive or reward
  
  such as is mentioned in section 7 or, as the case may be, without consideration
  
  or for a consideration which he knows to be Inadequate.
  (2) Where in any trial of an offence
  
  punishable under section 12 or under clause (b) of section 14, it is proved
  
  that any gratification (other than legal remuneration) or any valuable thing
  
  has been given or offered to be given or attempted to be given by an accused
  
  person, it shall be presumed, unless the contrary is proved, that he gave or offered
  
  to give or attempted to give that gratification or that valuable thing, as the
  
  case may be, as a motive or reward such as is mentioned in section 7, or, as
  
  the case may be, without consideration or for a consideration which he knows to
  
  be inadequate.
  (3) Notwithstanding anything contained in
  
  sub-section (1) and (2), the court may decline to draw the presumption referred
  
  to in either of the said sub-sections, if the gratification or thing aforesaid
  
  is, in its opinion, so trivial that no inference of corruption may fairly be
  
  drawn.