Questão jurídica principal
Whether the lease notices were null because the real estate agency signatories lacked power to bind the agency
Decisão extraída
The notices were valid; the agency could bind the landlords by direct representation, and the agency ratified the notices in any event.
Fundamentação extraída
The notices complied with mandatory written-form requirements. The agency's relationship as representative was clear, the signatories acted under the agency name, and there was no indication that the board had not empowered them. In any event, the agency expressly confirmed the termination motive afterward, amounting to ratification.