Question juridique clé
Whether the subsidiary constitutional complaint is admissible despite failure to pay the advance costs within the final deadline.
Solution extraite
The complaint is inadmissible because the appellant did not pay the ordered advance costs within the non-extendable deadline and did not prove timely payment by debit confirmation.
Motifs extraits
After warning under Art. 62(3) BGG, non-payment of the advance costs and failure to provide the required proof of payment triggers non-entry under Art. 117 BGG in connection with Art. 108(1)(a) BGG.