Questão jurídica principal
Whether the appeal had to be entered into despite the unpaid advance on costs.
Decisão extraída
No. Because the appellant neither paid the advance within the grace period nor proved timely payment, the appeal could not be entertained.
Fundamentação extraída
After the warning in the order of 2010-09-21, the conditions for non-entry under Art. 62(3) BGG and summary procedure under Art. 108(1)(a) BGG were met.