Finality in customs assessment bars reopening of implemented refund disputes, while reassessment was also upheld on merits.

A customs assessment dispute that had already attained finality up to the Supreme Court and been implemented could not be reopened in fresh refund or reassessment proceedings. The Tribunal held that a party which has accepted and acted upon a concluded order is estopped from taking a contrary stand, so the Department's challenge failed on finality. Independently, the reassessment was also sustained on merits because the transaction value was supported by commercial and bank realisation records, with no allegation of extra consideration or suppression, and the circular treating FOB price as cum-duty price had been correctly applied. The appeal therefore failed.

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Issues: (i) Whether the Department could reopen and challenge a customs duty assessment and refund dispute after the earlier order had attained finality up to the Supreme Court and had been implemented. (ii) Whether the impugned reassessment and refund order was sustainable on the merits, including application of the circular treating FOB price as cum-duty price.

Issue (i): Whether the Department could reopen and challenge a customs duty assessment and refund dispute after the earlier order had attained finality up to the Supreme Court and had been implemented.

Analysis: The earlier appellate order had already been upheld by the Tribunal and the Department's further appeal had been dismissed by the Supreme Court. The reassessment and refund were thereafter carried out and implemented by the Department. In that situation, the same issue could not be reopened in fresh proceedings. A refund proceeding cannot be used to question a concluded assessment, and a party that has accepted and acted upon an order cannot later take a contrary stand.

Conclusion: The Department was barred from reopening the matter, and the challenge failed on the ground of finality and estoppel.

Issue (ii): Whether the impugned reassessment and refund order was sustainable on the merits, including application of the circular treating FOB price as cum-duty price.

Analysis: Independently of finality, the transaction value was supported by commercial documents and bank realisation material, with no allegation of extra consideration or suppression. The circular relied upon by the respondent had been correctly applied, and the reassessment reflected the correct duty position.

Conclusion: The impugned order was sustainable on merits and no interference was called for.

Final Conclusion: The Department's appeal failed both because the dispute had already attained finality and because the impugned order was otherwise legally sustainable.

Ratio Decidendi: Once a customs assessment dispute has attained finality and has been implemented, it cannot be reopened through refund or reassessment proceedings, and a party that has accepted the order is estopped from taking a contrary position.

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