Key legal question
Whether the criminal appeal could be entered into despite non-payment of the ordered cost advance.
Extracted holding
No. Because the advance payment was not made within the extended deadline, the appeal had to be dismissed by non-entry under Art. 108 BGG.
Extracted reasoning
The advance-payment orders were deemed served even though returned marked 'unknown'; a party must ensure that court mail sent to the notified address reaches them. The advance remained unpaid.