Excise refund claims fail where an unchallenged capacity determination stands and unjust enrichment is not disproved.

Refund under excise law cannot be sustained by collaterally attacking an unchallenged annual capacity determination order or by relying on another assessee's case. The tribunal held that the finality of the capacity-fixing order could not be bypassed in refund proceedings, and a fresh determination could not be directed there. The refund also failed because the assessee did not prove duty was paid under protest in the prescribed manner, and unjust enrichment still applied. Invoices did not establish that the duty burden had not been passed on. The refund rejection was restored.

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Issues: (i) Whether the refund claims were maintainable when the order determining annual capacity of production had not been challenged or set aside and the claim was founded on another case; (ii) Whether the refund was barred by limitation and unjust enrichment in the absence of proof that duty was paid under protest and that the incidence had not been passed on.

Issue (i): Whether the refund claims were maintainable when the order determining annual capacity of production had not been challenged or set aside and the claim was founded on another case.

Analysis: The refund claim was based on a contention that the capacity determination was erroneous, but the underlying order fixing the annual capacity had never been appealed against or set aside. A refund proceeding could not be used to bypass the finality of that order. A tribunal could not direct a fresh capacity determination in collateral proceedings when the appeal before it concerned refund alone. A levy cannot be treated as unconstitutional merely because it is found erroneous in another proceeding.

Conclusion: The refund claims were not maintainable on this basis and the finding of unconstitutionality was rejected.

Issue (ii): Whether the refund was barred by limitation and unjust enrichment in the absence of proof that duty was paid under protest and that the incidence had not been passed on.

Analysis: The assessees did not establish that duty was paid under protest in the manner contemplated by the procedural rules, and the relevant evidence was not produced before the original authority. Even assuming protest, the claim still remained subject to the doctrine of unjust enrichment under the refund provisions. The invoices did not prove that the incidence of duty had not been passed on.

Conclusion: The refund was barred and the assessee failed to satisfy the statutory requirements for refund.

Final Conclusion: The appellate order granting refund was set aside, the original rejection of refund was restored, and the Revenue succeeded.

Ratio Decidendi: A refund claim under the excise law must satisfy the statutory refund regime, including the bar of unjust enrichment, and cannot succeed by collaterally attacking an unchallenged capacity-determination order or by relying on a decision rendered in another assessee's case.

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