Question juridique clé
Whether the constitutional complaint is admissible despite non-payment of the required advance costs within the deadline.
Solution extraite
The complaint is not entered into because the advance costs were neither paid in cash nor properly credited and proved within the non-extendable deadline.
Motifs extraits
After warning under Art. 62(3) BGG, the complainant did not comply with the payment order or provide the required proof of timely payment; therefore non-entry follows under the expedited procedure.