Questão jurídica principal
Whether the appeal court violated the appellant's right to be heard by deciding on necessary joinder without prior submissions.
Decisão extraída
No. The joinder question was a legal issue the court could raise ex officio; the parties had already addressed the relevant facts and legal context.
Fundamentação extraída
Under jura novit curia, the judge need not submit legal principles to discussion unless relying on an unforeseeable rule. The appellant had itself touched on the issue and the sister's position was not shown to require advance consultation.