National Transmission Corp. v. Misamis Oriental I Electric Cooperative
REITERATIONFacts
The Antecedents: Petitioner National Transmission Corporation (Transco) and respondent Misamis Oriental I Electric Cooperative, Inc. (MORESCO I) entered into a Transition Contract for the Supply of Electricity (TSC). Section 25 of Annex C of the TSC stipulated that billing errors due to wrong reading, arithmetical mistakes, or omissions must be corrected by the supplier via a debit/credit memo within ninety (90) days from the bill's receipt, failing which the claim is waived, unless the error is due to an inaccurate meter, which may be corrected anytime. Transco installed a billing meter at MORESCO I's substation with a multiplier of 1,000. In May 2002, NPC and MORESCO I signed the TSC. In July 2003, Transco replaced the meter with one having a multiplier of 3,500, but erroneously indicated a multiplier of 5,250 on the Meter Test Report, despite the actual multiplier being 3,500. Transco subsequently discovered it had used the incorrect multiplier of 3,500 instead of 5,250 for billings from August 26, 2003, to June 25, 2004, resulting in underbillings. Procedural History: On July 13, 2004, Transco sent MORESCO I a debit/credit memo for P6,462,797.81 for the period August 26, 2003, to June 25, 2004. On July 23, 2004, Genco sent a separate adjustment bill for P11,463,908.85 for the same periods. MORESCO I believed it was liable only for P4,220,047.17, covering the 9th, 10th, and 11th billing periods, arguing that the failure to apply the correct multiplier was an 'omission' under Section 25, and since the adjustment bills were sent beyond the 90-day period for the first eight billing periods, those claims had prescribed. MORESCO I offered to pay P4,220,047.17. Transco and Genco rejected the offer. MORESCO I filed a petition with the Energy Regulatory Commission (ERC). The ERC ruled in favor of MORESCO I, holding it liable only for P4,220,047.17, representing three months of corrected billings within the 90-day prescriptive period, and allowed the Prompt Payment Discount. The ERC denied the motions for reconsideration. Transco appealed to the Court of Appeals (CA), which affirmed the ERC ruling. Transco's motion for reconsideration was also denied. The Petition: Transco filed a Petition for Review on Certiorari with the Supreme Court, imputing reversible error to the CA for affirming the ERC's ruling that Transco's failure to install the correct device reflective of the multiplier constituted an omission under Section 25, rectifiable only within 90 days.
Issue(s)
Whether the Court of Appeals committed reversible error in affirming the ERC's ruling that Transco's failure to install the correct device reflective of the multiplier used in the billing constituted an omission under Section 25 of Annex "C" of the Transition Contract, which should thus be rectified within 90 days from receipt of the bill; and whether the 90-day prescriptive period applies. Whether the error in billing due to the application of an incorrect meter multiplier is an 'omission' or an 'error due to an inaccurate meter'; and the applicability of unjust enrichment.
Ruling
The Supreme Court denied the petition and affirmed the decision of the Court of Appeals. The Court held that Transco's failure to install the correct meter device with the proper multiplier constituted an 'omission' under Section 25 of Annex C to the Transition Supply Contract, and thus the claim for underbilling was subject to the 90-day prescriptive period. The Court found no reversible error in the CA's affirmance of the ERC ruling.
Ratio Decidendi
On the issue of whether Transco's failure to install the correct meter multiplier constituted an 'omission' under Section 25 of Annex C to the TSC, and the applicability of the 90-day prescriptive period: The Court affirmed the findings of the ERC and the CA that the error in billing due to the application of an incorrect meter multiplier was an 'omission' within the ambit of the first sentence of Section 25, Annex C to the TSC. The Court clarified that the provision envisions two categories of error: (1) error due to a wrong reading, arithmetical mistake, or omission, correctable within 90 days from receipt of the bill, and (2) error due to an inaccurate meter, correctable anytime. The Court found that Transco's failure to use the correct meter device with a multiplier of 5,250, despite admitting in the Meter Test Report that it used the said multiplier, constituted an omission. The subsequent discovery that the new device had a multiplier of 3,500 instead of 5,250 explained the underbillings. The Court emphasized that the error was caused by Transco's own act of installing a meter device with a different multiplier than what was intended, and that the correct meter device could have been obtained with ordinary diligence. Because the error was classified as an 'omission,' the 90-day period stipulated in Section 25 of Annex C to the TSC applied. The Court agreed with the ERC and CA that Transco and Genco waived their claim for the underbillings for the first eight billing periods because they failed to send the adjustment bills or debit/credit memos within ninety (90) days from the date of bill's receipt. Consequently, MORESCO I was only liable for the amount corresponding to the 9th, 10th, and 11th billing periods, which were within the 90-day prescriptive period. On the issue of whether the error in billing due to the application of an incorrect meter multiplier is an 'omission' or an 'error due to an inaccurate meter', and the applicability of unjust enrichment: The Court reiterated the principle that administrative agencies, due to their special knowledge and expertise, are in a better position to pass judgment on matters within their jurisdiction, and their findings of fact, when supported by substantial evidence and affirmed by the CA, are generally accorded great respect, if not finality. The Meter Test Report confirmed the accuracy of the device, and the testimony of Transco's witness indicated that the billing error was readily observable, distinguishing it from an 'inaccurate meter' error. The claim of unjust enrichment was also dismissed, as contractual obligations must be complied with in good faith.
Main Doctrine
An error in billing due to the application of an incorrect meter multiplier, where the correct multiplier was known or should have been known by the supplier, constitutes an 'omission' under Section 25 of Annex C to the Transition Supply Contract, requiring correction within ninety (90) days from the date of the customer's receipt of the bill, otherwise the claim is deemed waived. An 'inaccurate meter' error, which may be corrected anytime, refers to errors not readily detectable and requiring special tools or data.