Questão jurídica principal
Whether the appeal had to be dismissed for non-payment of the court cost advance within the deadline and grace period.
Decisão extraída
The appeal could not be considered because the advance payment was not shown to have been made in time, nor was proof of a valid transfer attempt provided.
Fundamentação extraída
Under Art. 62 BGG, the appellant bears the burden of proving timely payment. The prescribed final notice was validly served under Art. 44(2) BGG despite non-collection, and the appellants did not substantiate timely payment or a transfer to the correct account.