Kernrechtsfrage
Whether the appeal must be entered into despite non-payment of the cost advance within the extended deadline.
Extrahierter Entscheid
No entry can be made because the appellant did not pay the full cost advance by 15 April 2013.
Extrahierte Begründung
Under Art. 62 BGG, an advance for expected court costs must be paid within the set time limit and any grace period; if payment is not made within the grace period, the Federal Supreme Court does not enter into the appeal. The deadline passed without payment.