Unjust enrichment: refund entitlement requires re computation and proof that tax incidence was not passed on, with corroborative documents.

Remits analysis to the Refund Sanctioning Authority to re-compute consequential refunds and to determine entitlement subject to unjust enrichment; claimants must prove correct quantification and that the incidence of service tax was not passed on to ultimate customers, with CA certificates and credit notes requiring corroboration by invoices, bills and supporting records. For amounts paid in the later period, the RSA must examine feasibility of reassessment or revision of self assessed ST3 returns under the prescribed procedure before quantifying any refund, applying the same unjust enrichment scrutiny and compliance with refund procedure requirements.

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Issues: (i) Whether the refund claim relatable to space selling service (consequential to Tribunal order dt.05.04.2010) was entitled to re-computation and reconsideration by the original Refund Sanctioning Authority including examination of unjust enrichment; (ii) Whether refund claims for the period beyond the Tribunal's order (March 2006-March 2010) and re-classification of services require examination by the RSA including feasibility of re-assessment of self assessed ST3 returns and quantification subject to unjust enrichment.

Issue (i): Entitlement to re-computation of consequential refund and proof of crossing the bar of unjust enrichment for amounts paid as service tax relatable to space selling service under Tribunal order dt.05.04.2010.

Analysis: The Tribunal earlier held that amounts relatable to space selling service for the period prior to 01.05.2006 were not leviable and indicated entitlement to consequential refund subject to unjust enrichment and quantification. The RSA found insufficiency of documents to segregate consolidated BAS payments and held CA certificate and credit notes not conclusively proving non passing of incidence of tax. The authorities and parties relied on competing authorities on whether CA certificate alone suffices to rebut the statutory presumption under Section 12B; the issue requires examination of invoices, bills and supporting records to segregate amounts and to determine whether the incidence of tax was passed on to ultimate customers.

Conclusion: Remand to the original Refund Sanctioning Authority for re-computing the consequential refund admissible on merit and to re-determine whether the incidence of service tax was passed on to the ultimate customer; appellants permitted to prove non passing of incidence with supporting documents (mere CA certificate without corroboration may not be conclusive).

Issue (ii): Whether claims for the period March 2006-March 2010 (not covered by the Tribunal's earlier order) requiring re-classification and possible revision/re-assessment of self-assessed ST3 returns can be examined by RSA and whether refund, if any, can be quantified subject to unjust enrichment.

Analysis: For the later period, classification and liability were contested and payments were made under protest with ST3 returns filed as BAS. Authorities contend refunds cannot be granted without setting aside or modifying original/self assessments; relevant precedents require prescribed procedure for reassessment or revision of returns. The RSA must therefore examine feasibility of reassessment or revision of ST3 returns in accordance with statutory provisions and then quantify any eligible refund, applying the same unjust enrichment scrutiny as for Issue (i).

Conclusion: Remand to the original Refund Sanctioning Authority to examine feasibility of reassessment/revision of ST3 returns, and thereafter quantify eligible refund, if any, subject to crossing the bar of unjust enrichment and compliance with section 11B as applied to service tax.

Final Conclusion: Both appeals are allowed by way of remand; the RSA is directed to re-compute and re-examine entitlement and quantification of refunds and the issue of passing on of tax to ultimate customers with directions that CA certificates require corroboration by supporting documents for rebuttal of statutory presumption.

Ratio Decidendi: A claimant for refund must establish correct quantification and that the incidence of tax was not passed on to others; CA certificates and credit notes are not conclusive standing alone and refund claims require examination of primary documents and, where applicable, lawful reassessment of self assessed returns before grant of refund.

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