G.R. No. L-18965 - Compania Maritima vs. Insurance Co. of North America

San Pablo Manufacturing Corporation (SPMC) is a domestic corporation engaged in milling, manufacturing, and exporting coconut oil and allied products.
The Commissioner of Internal Revenue (CIR) assessed SPMC for various deficiency taxes for the taxable year 1987, notably including the deficiency miller’s tax and manufacturer’s sales tax.
The deficiency miller’s tax was imposed on SPMC’s sales of crude coconut oil to United Coconut Chemicals, Inc. (UNICHEM), while the deficiency sales tax was imposed on its sales of corn and edible oil as manufactured products.

SPMC contended that the crude oil sold to UNICHEM was, in effect, exported by UNICHEM as an ingredient in fatty acid and glycerine manufacturing.
SPMC relied on Section 168 of the 1987 Tax Code, arguing that there were two distinct exemptions for the miller’s tax:

When the milled products in their original state are actually exported by the miller or
When the milled products are exported as an ingredient or part of any manufactured article by the buyer.

Based on the fact that UNICHEM subsequently exported the products, SPMC maintained that it should be exempt from the 3% miller’s tax.

SPMC initially filed a protest against the tax assessments, which the Commissioner denied.
SPMC then elevated the matter to the Court of Tax Appeals (CTA) through Petition for Review (CTA Case No. 5423).
In its March 10, 2000 decision, the CTA cancelled the deficiency manufacturer’s tax for the sale of corn and edible oils but upheld the deficiency miller’s tax.
After a failed motion for partial reconsideration of the CTA decision, SPMC advanced the case to the Court of Appeals via a petition for review challenging the deficiency miller’s tax assessment.

The Court of Appeals dismissed SPMC’s petition on the basis that the verification attached to it was signed solely by the chief financial officer without accompanying a corporate secretary’s certificate, board resolution, or power of attorney authorizing the signature against forum shopping.
SPMC repeatedly argued for the liberal application of the verification rules by asserting that its submission substantially complied with the requirements.
SPMC admitted that it did not attach any evidence of specific authority (e.g., power of attorney, secretary’s certificate, board resolution) to demonstrate that the chief financial officer was empowered to sign the verification and certification on behalf of the corporation.

Whether the Court of Appeals erred in summarily dismissing SPMC’s petition for review due to the lack of proper verification and certification against forum shopping.
Whether SPMC’s claim of substantial compliance with the verification requirements can justify a liberal construction of the rules.

Whether SPMC is entitled to the tax exemption under Section 168 of the 1987 Tax Code considering its argument that the crude coconut oil sold to UNICHEM was exported as an ingredient in the manufacturing process.
Whether the interpretation of the export exemption clause should extend to cases where the export is effected by the buyer rather than the miller.