Refund claims cannot reopen a final customs assessment unless the assessment order is first challenged.

A refund claim based on a subsequent customs notification was held not maintainable where duty had already been paid under a completed assessment and the assessment order itself was never challenged. The Tribunal applied the principle that refund proceedings are not an appeal against assessment and that the refund authority cannot review or reopen a final assessment indirectly. A cited Tribunal decision was distinguished because it involved only a clerical duty-calculation error, not a challenge to a concluded assessment. The ruling confirms that a refund founded on later exemption relief requires a prior challenge to the assessment order.

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Issues: Whether a refund claim based on a subsequent customs notification was maintainable without first challenging the assessment order pursuant to which duty had been paid.

Analysis: The goods had been assessed to duty, the duty was paid, and only thereafter the refund claim was filed on the basis of Notification No. 62/2007-Cus. The Tribunal applied the settled principle that a refund proceeding is not an appeal against the assessment order and that the refund authority cannot sit in appeal over or review a completed assessment. The reliance placed on a different Tribunal decision was found inapplicable because that case involved a clerical error in duty calculation, unlike the present challenge to a concluded assessment.

Conclusion: The refund claim was not maintainable in the absence of any challenge to the assessment order, and the appeal failed.

Final Conclusion: The dismissal leaves intact the assessment-based rejection of refund and confirms that a completed customs assessment cannot be indirectly reopened through refund proceedings.

Ratio Decidendi: A refund authority cannot re-open or review a final assessment order, and a refund claim founded on a subsequent exemption notification is not maintainable unless the assessment itself has been challenged.

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