31. When cancellation may be ordered.—(1) Any person against whom a written instrument is void
or voidable, and who has reasonable apprehension that such instrument, if left outstanding may cause him
serious injury, may sue to have it adjudged void or voidable; and the court may, in its discretion, so adjudge
it and order it to be delivered up and cancelled.
(2) If the instrument has been registered under the Indian Registration Act, 1908 (16 of 1908), the court
shall also send a copy of its decree to the officer in whose office the instrument has been so registered; and
such officer shall note on the copy of the instrument contained in his books the fact of its cancellation.
32. What instruments may be partially cancelled.—Where an instrument is evidence of different
rights or different obligations, the court may, in a proper case, cancel it in part and allow it to stand for the
residue.
33. Power to require benefit to be restored or compensation to be made when instrument is
cancelled or is successfully resisted as being void or voidable.—(1) On adjudging the cancellation of an
instrument, the court may require the party to whom such relief is granted, to restore, so far as may be any
benefit which he may have received from the other party and to make any compensation to him which
justice may require.
(2) Where a defendant successfully resists any suit on the ground—
(a) that the instrument sought to be enforced against him in the suit is voidable, the court may if
the defendant has received any benefit under the instrument from the other party, require him to restore,
so far as may be, such benefit to that party or to make compensation for it;
(b) that the agreement sought to be enforced against him in the suit is void by reason of his not
having been competent to contract under section 11 of the Indian Contract Act, 1872 (9 of 1872), the
court may, if the defendant has received any benefit under the agreement from the other party, require
him to restore, so far as may be, such benefit to that party, to the extent to which he or his estate has
benefited thereby