Unjust enrichment applies to refund claims on an unsustainable levy unless the burden is proved not to have been passed on.

An authorisation for a revenue appeal was held valid where it referred to the reasons recorded in the grounds of appeal, and the omission to repeat those reasons did not vitiate the appeal. On refund of sugar cess paid on imported sugar, the doctrine of unjust enrichment was held applicable even though the levy was treated as unsustainable, because a refund claimant must still prove that the burden was not passed on unless the statutory provision itself has been struck down. The matter was remanded for a fresh finding on passing on of incidence.

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Issues: (i) Whether the revenue appeal was vitiated for want of proper authorisation. (ii) Whether refund of sugar cess paid on imported sugar was barred by the doctrine of unjust enrichment, and whether the matter required remand for findings on passing on of incidence.

Issue (i): Whether the revenue appeal was vitiated for want of proper authorisation.

Analysis: The authorisation referred to the reasons recorded in the grounds of appeal, and the grounds themselves contained the basis for challenging the order-in-appeal. The omission to repeat those reasons in the authorisation did not render it invalid on the facts of the case.

Conclusion: The preliminary objection was rejected against the assessee.

Issue (ii): Whether refund of sugar cess paid on imported sugar was barred by the doctrine of unjust enrichment, and whether the matter required remand for findings on passing on of incidence.

Analysis: Sugar cess under the Sugar Cess Act, 1982 is a levy on sugar produced in India and payable by the occupier of the sugar factory. The levy on imported sugar was treated as not sustainable, but that by itself did not exclude the application of unjust enrichment. The binding principle applied was that even where refund is claimed on the basis of an unconstitutional levy, the claimant must still establish that the burden was not passed on to others unless the statute itself has been struck down. However, the appellate authority had not recorded findings on whether the incidence of duty had in fact been passed on.

Conclusion: The doctrine of unjust enrichment applied, the contrary view was set aside, and the matter was remanded for a fresh finding on passing on of incidence.

Final Conclusion: The appeal succeeded to the extent that the refund claim could not be allowed without examining unjust enrichment, but the case was sent back for a limited reconsideration on the factual issue of passing on the burden.

Ratio Decidendi: A refund claim based on an allegedly unconstitutional levy is still subject to the doctrine of unjust enrichment unless the statutory provision itself has been struck down, and the claimant must prove that the burden was not passed on.

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