Tribunal grants duty refund for first period but denies for second period due to unjust enrichment doctrine.

The Tribunal granted the appellants a refund of Rs. 1,40,113.06 for the first period as duty payment was evidenced through debit entries. However, the refund claim for the second period, amounting to Rs. 14,06,177.45, was denied due to the doctrine of unjust enrichment, as the duty incidence was deemed to have been passed on to customers. The appellants were unable to provide evidence to rebut the unjust enrichment presumption, leading to the denial of the refund for the second period.

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Issues involved: Whether refund can be sanctioned without producing duty paying documents and whether refund is hit by the doctrine of unjust enrichment.

Refund Claim Pertaining to Period 1-3-1970 to 30-9-1974:
- Appellants disputed inclusion of freight charges in assessable value.
- Appellate Tribunal allowed appeal for not including transportation cost in assessable value.
- Refund claim rejected for non-production of duty paying documents and unjust enrichment.
- Appellants divided refund claim into two parts.
- First part: Rs. 1,40,113.06 for period 1-3-1970 to 16-2-1972.
- Department issued DD-2 demanding differential duty, paid by appellants.
- Principle of unjust enrichment not applicable when duty paid separately.
- Second part: Rs. 14,06,177.45 for period 17-2-1972 to 30-9-1974.
- Freight charges included in assessable value as per Department's order.
- No opportunity given to show duty not passed on to customers.

Counter Arguments:
- Assessee must produce duty paying documents to prevent duplicate refunds.
- Documents submitted to Department kept for specified period and destroyed later.
- Production of duty paying documents essential for refund claim.
- Doctrine of unjust enrichment applicable for second period refund claim.

Judgment:
- Tribunal acknowledged duty paid for first period through debit entries in P.L.A.
- Presumption of duty passed on to buyer not attracted in this case.
- Non-production of documents not a hindrance to refund for first period.
- Appellants entitled to refund of Rs. 1,40,113.06 for first period.
- Remaining refund claim not paid due to duty incidence passed on to customers.
- Appellants failed to provide evidence to counter unjust enrichment bar.
- Second part of refund claim denied based on principle of unjust enrichment.

Conclusion:
- Appeal disposed of with refund granted for first period but denied for second period based on unjust enrichment principle.

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