The Code of Civil Procedure, 1908
§149 — Power to make up deficiency of court-fees
Where the whole or any part of any fee prescribed for any document by the law for the time being in force relating to court-fees has not been paid, the Court may, in its discretion, at any stage, allow the person, by whom such fee is payable, to pay the whole or part, as the case may be, of such court-fee; and upon such payment the document, in respect of which fee is payable, shall have the same force and effect as if such fee had been paid in the first instance.