law: Indian Trusts Act, 1882 
  62. Wrongful purchase by trustee 
  Where a trustee has wrongfully bought trust-property, the
  
  beneficiary has a right to have the property declared subject to the trust or
  
  retransferred by the trustee, if it remains in his hands unsold, or, if it has
  
  been bought from him by any person with notice of the trust, by such person.
  
  But in such case the beneficiary must repay the purchase-money paid by the
  
  trustee, with interest, and such other expenses (if any) as he has properly
  
  incurred in the preservation of the property; and the trustee or purchaser must
  
  (a) account for the net profits of the property, (b) be charged with an
  
  occupation-rent, if he has been in actual possession of the property, and (c)
  
  allow the beneficiary to deduct a proportionate part of the purchase-money if
  
  the property has been deteriorated by the acts or omissions of the trustee or
  
  purchaser.
  Nothing in this sections- 
  (a) impairs the rights of lessees and others, who, before the
  
  institution of a suit to have the property declared subject to the trust or
  
  retransferred, have contracted in good faith with the trustee or purchaser; or
  (b) entitles the beneficiary to have the property declared
  
  subject to the trust or retransferred where he, being competent to contract,
  
  has himself, without coercion or undue influence having been brought to bear on
  
  him, ratified the sale to the trustee with full knowledge of the facts of the
  
  case and of his rights as against the trustee.