Excise Tax Refunds: Proving Authority to Operate and the Proper Claimant

Silkair (Singapore) Pte. Ltd., a foreign airline, sought a refund of excise taxes it paid on aviation jet fuel purchased from Petron Corporation from June to December 2000. The Supreme Court denied the claim, ruling that Silkair failed to prove its authority to operate in the Philippines and, more fundamentally, that it was not the proper party to claim the refund. The case illustrates two critical lessons in Philippine tax litigation: documentary evidence must comply with the rules on admissibility, and only the statutory taxpayer—not the buyer who bears the economic burden—may claim a refund of an indirect tax.

The Facts of the Case

Silkair, a Singapore corporation with a representative office in Cebu City, operated international flights on the Singapore-Cebu-Singapore and Singapore-Cebu-Davao-Singapore routes. It filed an administrative claim with the Bureau of Internal Revenue (BIR) for a refund of P3,983,590.49 in excise taxes paid on jet fuel purchases from Petron.

Silkair relied on the exemption under the National Internal Revenue Code (NIRC) for petroleum products sold to international carriers and exempt entities covered by tax treaties, provided the other country grants a similar exemption. It also invoked the Air Transport Agreement between the Philippines and Singapore, which exempts fuel taken on board by a designated airline of either country.

When the BIR failed to act, Silkair filed a petition for review with the Court of Tax Appeals (CTA) to prevent the lapse of the two-year prescriptive period for claiming a refund.

The Issues Before the Court

Two issues were raised: (1) whether Silkair substantially proved its authority to operate in the Philippines during the relevant period, and (2) whether Silkair was the proper party to claim the refund.

The Ruling: Evidence Rules Matter

The CTA First Division initially found Silkair qualified for the exemption. However, it denied the refund because Silkair failed to present proof of its authority to operate in the Philippines. The documents it offered—its SEC Certificate of Registration and CAB operating permits—were merely photocopies that were never admitted in evidence.

Silkair argued that the CTA should have taken judicial notice of its SEC registration because the same document had been admitted in similar cases before the same court. The Supreme Court rejected this argument.

Under the Rules of Court, judicial notice is mandatory only for matters like the existence of states, the law of nations, and official acts of the legislative, executive, and judicial departments. A private corporation's SEC registration does not fall under these categories. Neither could the CTA take discretionary judicial notice, because a hearing is required before judicial notice may be taken.

The Court also applied the best evidence rule: when the subject of inquiry is the contents of a document, no evidence is admissible other than the original itself. Since Silkair presented only photocopies without offering the originals for comparison and verification, the documents were properly excluded. As the Court noted, Silkair's admission that the originals were available made its failure to present them unjustified.

The Ruling: Only the Statutory Taxpayer May Claim a Refund

The Court's second holding was even more decisive. Relying on its earlier rulings in Silkair (Singapore) Pte, Ltd. v. Commissioner of Internal Revenue (G.R. No. 173594, February 6, 2008, and G.R. Nos. 171383 and 172379, November 14, 2008), the Court held that Petron—not Silkair—was the proper party to claim the refund.

An excise tax is an indirect tax. Under the NIRC, excise taxes apply to goods manufactured or produced in the Philippines for domestic sale or consumption. The return shall be filed and the excise tax paid by the manufacturer or producer before removal of domestic products from the place of production. Thus, the statutory taxpayer is the manufacturer or producer.

While Petron could shift the burden of the tax to Silkair by adding it to the selling price, the amount passed on becomes part of the purchase price—not a tax. As the Court explained, citing Commissioner of Internal Revenue v. Philippine Long Distance Telephone Company (G.R. No. 140230, December 15, 2005), shifting the burden of a tax does not shift the liability to pay it.

The Court applied the doctrine of stare decisis, noting that it had already settled this exact issue in prior Silkair cases. Tax refunds, being in the nature of tax exemptions, must be strictly construed against the taxpayer, as taxes are the lifeblood of the government.

Practical Takeaways

• Original documents are essential. Photocopies of critical documents, such as SEC registrations and operating permits, are inadmissible unless the originals are presented for comparison or a legal exception applies. Courts will not take judicial notice of private documents merely because they were admitted in other cases.
• Know who the statutory taxpayer is. For excise taxes on domestic products, the manufacturer or producer is the statutory taxpayer. Only that entity may claim a refund, even if the tax burden was passed on to the buyer.
• Indirect taxes shift burden, not liability. When a seller passes an excise tax to a buyer, the amount becomes part of the purchase price. The buyer is not the taxpayer and cannot claim a refund.
• Judicial notice has limits. Mandatory judicial notice covers only a narrow set of matters. Discretionary judicial notice requires a hearing. Litigants should not rely on it to cure evidentiary lapses.
• Tax exemptions are strictly construed. Claims for refunds, which represent a loss of government revenue, must rest on clear and unequivocal provisions of law. Courts will not enlarge exemptions by construction.

This article is general information and not legal advice. For your specific situation, consult a lawyer or ask ASG Legal AI.