G.R. No. L-18975 December 26, 1963
CITY OF NAGA, plaintiff-appellee, vs. BELEN R. TOLENTINO, defendant-appellant.

FACTS

The City of Naga filed an action to recover unpaid rentals from Belen Tolentino for her lease of two doors in the city public market. Tolentino had originally leased the doors at a monthly rental of P51.00. In 1949, the city council enacted an ordinance increasing the rental to P120.00. Tolentino, along with others, challenged the validity of this ordinance in a separate case (G.R. No. L-6815), arguing it was enacted in excess of the city’s charter powers. During the pendency of that annulment case, Tolentino deposited only the original P51.00 monthly rental to avoid delinquency under the old contract.
The Supreme Court ultimately upheld the ordinance’s validity in G.R. No. L-6815. Consequently, the City of Naga demanded payment from Tolentino for the increased rental differential from January 1949 to October 1958. Tolentino refused to pay the increase, leading to the instant collection suit. Tolentino defended by arguing, inter alia, that the city’s claim for the increased rentals was barred for failure to assert it as a compulsory counterclaim in the earlier annulment case (G.R. No. L-6815).

ISSUE

Whether the City of Naga’s claim for the increased rentals is barred for failure to plead it as a compulsory counterclaim in the prior annulment case (G.R. No. L-6815).

RULING

No, the claim is not barred. The Supreme Court affirmed the lower court’s judgment ordering Tolentino to pay the unpaid rentals. The legal logic hinges on the distinction between compulsory and permissive counterclaims under the Rules of Court. For a counterclaim to be compulsory—such that its omission bars a future action—it must arise out of or be necessarily connected with the transaction or occurrence that is the subject matter of the opposing party’s claim.
In the prior annulment case, the core transaction or occurrence was the enactment and validity of the ordinance itself. The city’s cause of action in the present case, however, arises from the contract of lease and the enforcement of the now-upheld ordinance to collect accrued rentals. At the time the annulment case was filed, the claim for increased rentals was not yet due and demandable, as the very obligation to pay depended on the resolution of the ordinance’s validity. Thus, the collection claim was premature and not logically connected to the purely legal question of the ordinance’s validity. The city’s right to collect stemmed not from the ordinance’s passage but from its subsequent enforcement against a lessee who continued to occupy the premises. Therefore, the claim was permissive, not compulsory, and its assertion in a separate action is proper.