Title
Republic vs. Philippine Rabbit Bus Lines, Inc.
Case
G.R. No. L-26862
Decision Date
Mar 30, 1970
The Republic of the Philippines contested Philippine Rabbit Bus Lines, Inc.'s use of negotiable backpay certificates to pay motor vehicle registration fees. The Supreme Court ruled that such fees are regulatory, not taxes, and invalidated the payment, ordering the defendant to pay in cash.

Case Summary (G.R. No. L-26862)

Facts of Payment and Certificates

Philippine Rabbit Bus Lines, Inc., as assignee of negotiable backpay certificates, tendered P78,636.17 to satisfy the second installment of 1959 motor vehicle registration fees for 238 vehicles. The Motor Vehicles Office in Baguio City accepted these certificates, issued official receipts, and the Auditor General concurred with the National Treasurer’s administrative approval of this payment mode.

Procedural History and Lower Court Ruling

On January 17, 1963, the Republic sued to annul the certificate-based payment, demand cash plus surcharges and interest, and declare the certificates’ use void. The Regional Trial Court of Baguio City dismissed the complaint on November 24, 1965, holding that assignees could use negotiable backpay certificates to pay registration fees. The case reached the Supreme Court via certification from the Court of Appeals, presenting a purely legal question.

Central Legal Issue

Can negotiable backpay certificates discharge an obligation for motor vehicle registration fees, given the statutory distinction between taxes and regulatory fees under the government’s police power?

Nature of Registration Fees under the Police Power

Section 8 of RA 587 imposes “registration fees” as regulatory charges, not as taxes. A tax is an enforced, proportional contribution to raise general revenue. A police-power fee regulates activities and privileges, with no primary revenue-raising objective. Motor vehicle registration fees fall squarely within the police power and are not taxes collectible under the Back Pay Law.

Relevance of Republic Act No. 5448

RA 5448 imposes an “additional tax” on privately-owned passenger automobiles, motorcycles, and scooters for the Special Science Fund. Its explicit designation of an “additional tax” confirms that the earlier vehicle “registration fees” under RA 587 were regulatory and not taxable assessments.

Assignee’s Right to Use Backpay Certificates

Because the obligation to register motor vehicles is a fee under police power rather than a tax, the Supreme Court found no need to address whether assignees generally may use backpay certificates to satisfy tax obligations. The Back Pay Law’s tax-satisfaction provision is inapplicable, and therefore the lower court erred in upholding payment by negotiable certificates.

Estoppel and Governmen

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