Questão jurídica principal
Whether the constitutional complaint was admissible despite the unpaid court advance.
Decisão extraída
The complaint was not admitted because the appellant failed to pay the required advance within the non-extendable grace period.
Fundamentação extraída
After proper warning under Art. 62(3) BGG, the advance was neither paid in cash nor validly credited through a Swiss postal or bank account, and no timely debit confirmation was filed.