Key legal question
Whether the constitutional complaint was admissible despite non-payment of the ordered cost advance within the non-extendable deadline.
Extracted holding
No. The appellant did not pay the advance, did not deposit it in cash or through a post office, and did not submit proof of timely debit after a payment order.
Extracted reasoning
After a valid reminder under Art. 62 para. 3 BGG, failure to comply with the advance-payment obligation required non-entry under Art. 108 para. 1 lit. a BGG in the constitutional complaint procedure.