law: 130.Validity of certificate and amendment thereof.-
  (1) When the Authorised Officer or the competent authority, as the case may be, issues a certificate to a Recovery Officer under section 129, it shall not be open to the employer to dispute before the Recovery Officer the correctness of the amount, and no objection to the certificate on any other ground shall be entertained by the Recovery Officer.
  (2) Notwithstanding the issue of a certificate to a Recovery Officer, the Authorised Officer or the competent authority, as the case may be, shall have power to withdraw the certificate or correct any clerical or arithmetical mistake in the certificate by sending intimation to the Recovery Officer.
  (3) The Authorised Officer or the competent authority, as the case may be, shall intimate to the Recovery Officer any orders of withdrawing or cancelling a certificate or any correction made by him in respect of the said certificate under sub-section (2).
  (4) Notwithstanding that a certificate has been issued to the Recovery Officer for the recovery of any amount, the Authorised Officer or the competent authority, as the case may be, may grant time to the employer for payment of the amount recoverable under the certificate and thereupon the Recovery Officer shall stay the proceedings until the expiry of the time so granted.
  (5) Where a certificate for the recovery of amount has been issued, the Authorised Officer or the competent authority, as the case may be, shall keep the Recovery Officer informed of any amount paid or time granted for payment, subsequent to the issue of such certificate.
  (6) Where the order giving rise to a demand of amount for which a certificate for recovery has been issued under section 129 has been modified in appeal or other proceeding under this Code, resulting in reduction of the demand but the order is the subject matter of further proceeding under this Code, the Authorised Officer or the competent authority, as the case may be, shall stay the recovery of such part of the amount of the certificate as pertains to the said reduction for the period for which the appeal or other proceeding remains pending.
  (7) Where a certificate for the recovery of amount has been issued and subsequently the amount of the outstanding demand is reduced as a result of an appeal or other proceeding under this Code, the Authorised Officer or the competent authority, as the case may be, shall, when the order being the subject matter of such appeal or other proceeding becomes final and conclusive, amend the certificate or withdraw it, as the case may be in consonance with such finality or conclusion.