Question juridique clé
Whether the complaint should be admitted despite non-payment of the advance costs within the extended deadline.
Solution extraite
The complaint could not be heard because the required advance costs were not paid in time and no acceptable proof of timely payment was provided.
Motifs extraits
Under Art. 62(3) BGG, non-payment after a grace period leads to non-entry; the warning had been given and the appellant did not comply.