Questão jurídica principal
Whether the debt collections were null because they allegedly constituted an abuse of rights
Decisão extraída
No. Abuse of rights justifying nullity is reserved for exceptional cases, and the appellants merely contested the underlying claim, which the enforcement authorities could not decide prejudicially.
Fundamentação extraída
The creditor had a colorable basis, an arbitration concerning the claim was pending, and debt collection may be used legally to interrupt limitation. The authorities of enforcement are not competent to rule on the debtor's material liability.