Excise duty refund and restitution principles barred retention of interim refunds once statutory entitlement was not proved.

Refund of excise duty was unavailable where the amended refund scheme required proof that the duty incidence had not been passed on, and the statutory presumption under the excise law was not rebutted by any pleading or evidence. Writ jurisdiction could not be used to grant refund without establishing actual entitlement, so the challenge failed. Amounts obtained only under interim mandatory orders were subject to restitution once the petitions failed; the recipients had to restore the sums with interest to place the parties in the position they would have occupied absent interim relief, and the undertakings furnished supported that obligation.

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Issues: (i) whether the petitioners were entitled to refund of excise duty in writ jurisdiction despite the amended refund regime and the doctrine of unjust enrichment; (ii) whether amounts received under interim orders could be retained or had to be restored with interest on failure of the petitions.

Issue (i): Whether the petitioners were entitled to refund of excise duty in writ jurisdiction despite the amended refund regime and the doctrine of unjust enrichment.

Analysis: The refund claims were pending when the amended Section 11B and Section 12B of the Central Excises and Salt Act, 1944 came into force. The amended scheme permits refund only where the claimant proves that the incidence of duty has not been passed on, and Section 12B creates a rebuttable presumption that the duty has been passed on to the buyer. The petitions contained no pleading or proof that the burden of duty had been borne by the petitioners themselves. The Court also held that writ jurisdiction cannot be used to grant refund where entitlement is not established and where the State would otherwise be exposed to a claim of refund without proof of actual incidence of loss.

Conclusion: The petitioners were not entitled to refund and the challenge failed on this issue, in favour of the Revenue.

Issue (ii): Whether amounts received under interim orders could be retained or had to be restored with interest on failure of the petitions.

Analysis: The refunds had been obtained only because of interim mandatory directions and were expressly subject to the final outcome. Once the petitions failed, the principle of restitution applied. The Court held that a party who has received the benefit of an interim order must restore that benefit when the order is vacated, and interest could be awarded as part of restitution to place the parties in the same position as they would have occupied but for the interim relief. The undertakings furnished by the petitioners reinforced the obligation to return the amounts received.

Conclusion: The petitioners were bound to restore the amounts received under interim orders together with interest, in favour of the Revenue.

Final Conclusion: The petitions were rejected, and the interim refunds were undone by directions for repayment with interest and consequential enforcement of the undertakings.

Ratio Decidendi: In refund matters under the amended excise law, refund is unavailable unless the claimant rebuts the statutory presumption that duty has been passed on, and any benefit obtained only under an interim order must be restored on failure of the petition by applying the principle of restitution.

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