Question juridique clé
Whether the debtor could still challenge the auction sale after the purchaser paid the balance price.
Solution extraite
No; once the purchase price was paid, the protective purpose of the auction-payment rules was satisfied and the complaint no longer served to annul the sale.
Motifs extraits
Articles 143 SchKG and 63 VZG aim to compel payment and enable rapid resale if payment fails. Because the balance was paid before the complaint was filed, ordering repayment and a new auction would contradict that purpose; at most the debtor sought a retrospective finding of procedural fault, which the complaint procedure does not allow.