Question juridique clé
Whether the constitutional complaint could be entered into despite non-payment of the court cost advance within the non-extendable grace period.
Solution extraite
No. Because the appellant neither paid the CHF 300 advance nor proved timely debit/transfer as required, the complaint was not entered into.
Motifs extraits
After the warning under Art. 62(3) BGG, the appellant failed to comply with the non-extendable deadline and did not provide the required proof of timely payment; non-entry followed under Arts. 117 and 108(1)(a) BGG.